En ese quiosco venden periódicos, agua y también tarjetas para el autobús.

Because Spanish often starts with the place to set the scene first. En ese quiosco means at/in that kiosk/newsstand, and it tells you where the action happens.

You could also say Venden periódicos, agua y también tarjetas para el autobús en ese quiosco, but starting with En ese quiosco sounds very natural.

Ese means that. It points to something not right next to the speaker.

A very simple contrast is:

• este quiosco = this kiosk
• ese quiosco = that kiosk
• aquel quiosco = that kiosk over there

So ese is used when the kiosk is not especially close to the speaker.

Spanish often leaves out the subject when it is understood from the verb form. Venden is they sell.

In this sentence, they does not refer to specific people you know. It is an indefinite they, like English:

• They sell newspapers there.
• You can buy newspapers there.

So venden here means something like they sell / they have for sale.

Not exactly. It is more like an indefinite they sentence.

• Venden periódicos... = They sell newspapers...
• Se venden periódicos... = Newspapers are sold... / They sell newspapers...

Both can work, but the sentence you have uses the very common everyday structure with third person plural and no explicit subject.

Because Spanish often leaves out articles when talking about things in a general, non-specific way after verbs like vender, comprar, tener, etc.

So:

• venden periódicos = they sell newspapers
• venden agua = they sell water
• venden tarjetas = they sell cards

If you added articles, it would usually sound more specific:

• venden los periódicos = they sell the newspapers
• venden las tarjetas = they sell the cards

That is not the idea here.

Here agua appears with no article because it is just part of a general list of things sold.

If you did use an article in the singular, it would normally be el agua, even though agua is a feminine noun:

• el agua fría
• mucha agua
• esta agua

It takes el in the singular because the stressed a sound at the beginning would sound awkward with la. But the noun is still feminine.

In your sentence, though, no article is needed at all: periódicos, agua y también tarjetas...

Yes, basically. Quiosco means kiosk, newsstand, or a small booth/shop.

In Spain, a quiosco often sells things like:

• newspapers
• magazines
• water
• snacks
• transport cards

So in this sentence, quiosco is probably best understood as a newsstand or small kiosk.

Yes. Both spellings exist, and both are accepted. Quiosco is very common, and kiosco is also seen.

They are pronounced the same.

También means also / too, and here it adds one more item to the list:

• periódicos
• agua
• and also tarjetas para el autobús

Putting también before tarjetas sounds natural because it highlights the extra item being added.

You may also hear different positions in other sentences, because Spanish allows some flexibility with también. But in this sentence, y también tarjetas... is perfectly normal.

It means cards for the bus, but in natural English this often means something like:

• bus cards
• travel cards
• transport cards
• prepaid bus cards
• bus passes

The exact meaning depends on the local transport system. The key idea is that these are cards used to travel by bus.

Because para expresses purpose or intended use.

So:

• tarjetas para el autobús = cards for using on the bus
• tarjetas del autobús = cards of the bus / belonging to the bus, which is not the usual idea here

In this sentence, para is the natural choice because the cards are meant to be used for bus travel.

Because autobús is a masculine noun:

• el autobús
• un autobús

So para el autobús simply means for the bus.

Yes, they matter. Accent marks in Spanish show which syllable is stressed, and sometimes they also distinguish words.

In your sentence:

• periódicos stresses the rió
• también stresses the last syllable
• autobús stresses the last syllable

If you leave the accent marks out, the spelling is incorrect.

In Spain, quiosco is pronounced approximately KYOS-ko.

Very roughly:

• qui sounds like ky
• os sounds like os
• co sounds like ko

So the stress is on the middle part: KYOS.

Yes, in many situations that is a very natural way to understand it.

Literally, venden is they sell, but English often prefers:

• At that kiosk, you can buy newspapers, water, and bus cards.

That captures the practical meaning very well, even though the Spanish verb itself is still they sell.

Because también adds emphasis to the final item. It suggests in addition or as well.

So:

• periódicos, agua y tarjetas = a simple list
• periódicos, agua y también tarjetas = a list where the last item is being especially added

It is a small nuance, but it makes the sentence feel a bit more expressive.