Na kiosku kraj kolodvora možeš kupiti novine, vodu i lijepe razglednice grada.

Both can exist in Croatian, but they suggest slightly different ways of thinking about the place.

• na kiosku literally means something like at the kiosk / on the kiosk, but in everyday Croatian it is the normal way to say you buy something at a kiosk, meaning the kiosk as a point of sale.
• u kiosku means in the kiosk, focusing more on being physically inside it.

So in this sentence, Na kiosku is the natural choice because the sentence is about where you can buy something.

Also, after na meaning location, Croatian uses the locative case, so:

• kiosk → kiosku

kiosku is in the locative singular.

The preposition na can take different cases depending on meaning:

• na + accusative = movement toward something
• na + locative = location at/on something

Here the meaning is location: at the kiosk, so we use the locative:

• kiosk → na kiosku

The ending -u is a common locative singular ending for masculine nouns.

kolodvora is in the genitive singular.

The preposition kraj means near / by / beside, and it is followed by the genitive:

• kraj kolodvora = near the station

So:

• kolodvor → kolodvora

This is just something you learn together with the preposition:

• kraj + genitive

You could compare:

• blizu kolodvora = near the station
• pored kolodvora = beside the station

These also use the genitive.

This is a very common Croatian structure:

• možeš = you can
• kupiti = to buy

Together:

• možeš kupiti = you can buy

Croatian often uses a finite verb plus an infinitive, just like English:

• I can buy → mogu kupiti
• you can buy → možeš kupiti

So the two verbs are not unusual at all.

This is about aspect, which is very important in Croatian.

• kupiti = perfective → to buy, as a complete action
• kupovati = imperfective → to be buying / to buy repeatedly / to buy in general

In this sentence, možeš kupiti means you can buy these items there, as complete purchases. That is why kupiti sounds natural.

If you used kupovati, it would suggest more of a habitual or ongoing activity:

• Na kiosku kraj kolodvora možeš kupovati novine... = You can do your newspaper-buying there / you can buy there regularly

That is possible in some contexts, but kupiti is the more natural choice here.

This is a classic learner question.

In Croatian, novine is normally a plural noun. It means:

• newspaper
• or newspapers, depending on context

So even if English might say a newspaper, Croatian usually says novine.

Examples:

• Čitam novine. = I’m reading the newspaper / newspapers.
• Kupio sam novine. = I bought a newspaper / newspapers.

So yes, it looks plural, and grammatically it is plural, but its meaning can be singular or plural in English depending on the situation.

Because vodu is the accusative singular of voda.

In this sentence, vodu is a direct object, because it is something you can buy:

• buy what? → water

For feminine nouns ending in -a, the accusative singular usually changes -a to -u:

• voda → vodu
• knjiga → knjigu
• kava → kavu

So:

• možeš kupiti vodu = you can buy water

Both words are in the accusative plural.

The phrase means:

• lijepe razglednice = beautiful postcards

Since these are also direct objects of kupiti, they must be in the accusative.

For feminine plural inanimate nouns, the accusative plural looks the same as the nominative plural:

• razglednice = postcards
• lijepe razglednice = beautiful postcards

The adjective lijepe agrees with the noun razglednice in:

• gender: feminine
• number: plural
• case: accusative

grada is the genitive singular of grad.

The phrase:

• razglednice grada

literally means:

• postcards of the city

In natural English, we often say:

• postcards of the city
• city postcards
• postcards showing the city

Croatian often uses the genitive to express this kind of relationship:

• karta grada = map of the city
• centar grada = city center / center of the city
• ulice grada = streets of the city

So grada explains what kind of postcards they are.

Because Croatian has no articles.

English says:

• at the kiosk
• near the station
• buy a newspaper
• the city

Croatian simply uses the noun without articles:

• na kiosku
• kraj kolodvora
• novine
• grada

Whether something is a, the, or just a general noun is understood from context.

This is one of the biggest differences between English and Croatian.

It can do both.

Literally, možeš is:

• you can for one person informal singular

But Croatian, like English, often uses you in a general sense:

• Na kiosku kraj kolodvora možeš kupiti... = At the kiosk near the station, you can buy... = ...one can buy... = ...you can get...

So depending on context, it may be:

1. a real you addressed to one person, or
2. a general statement about what is available there

Yes. Croatian word order is much freer than English word order because cases show the grammatical roles.

The original order:

• Na kiosku kraj kolodvora možeš kupiti novine, vodu i lijepe razglednice grada.

This is natural because it starts with the place, then gives the action, then the things you can buy.

But Croatian can move parts around for emphasis, for example:

• Možeš kupiti novine, vodu i lijepe razglednice grada na kiosku kraj kolodvora.
• Novine, vodu i lijepe razglednice grada možeš kupiti na kiosku kraj kolodvora.

These are still understandable, but they emphasize different parts.

So the original version is a neutral, natural way to say it.

Yes. All of these can mean something like near the station, but there are small differences in tone:

• kraj kolodvora = by / near the station
• blizu kolodvora = close to the station
• pored kolodvora = beside / next to the station

In many everyday situations, they are very similar.

All of them take the genitive:

• kraj kolodvora
• blizu kolodvora
• pored kolodvora

So if you know one, it is useful to learn the others too.

Look for the direct objects after kupiti.

In this sentence, the things being bought are:

• novine
• vodu
• lijepe razglednice grada

These form a list:

• newspapers
• water
• beautiful postcards of the city

A useful way to test it is to ask:

• kupiti što? = buy what?

Answer:

• novine, vodu i lijepe razglednice grada

That is why these nouns are in the accusative, except where another noun inside the phrase requires a different case, like grada in the genitive.