Di pojok ruang tamu ada dua toples biskuit untuk tamu.

Indonesian often starts a sentence with the location when the speaker wants to set the scene first.

So:

Di pojok ruang tamu ada dua toples biskuit untuk tamu.

literally feels like:

In the corner of the living room, there are two jars of biscuits for guests.

This is very natural in Indonesian. You could also say:

Ada dua toples biskuit untuk tamu di pojok ruang tamu.

That version is also grammatical, but it puts the existence of the jars first, while the original puts the location first.

Here, ada means something like there is / there are.

It shows that something exists or is present in a place.

So:

• ada dua toples = there are two jars
• ada buku di meja = there is/are a book/books on the table

In this sentence, ada is not exactly the same as English is or are in every situation. It is specifically used to express existence/presence.

In Indonesian, noun relationships like corner of the living room are usually expressed simply by putting nouns next to each other.

So:

• pojok ruang tamu = the corner of the living room
• pintu rumah = the door of the house / the house door
• warna mobil = the color of the car

Using dari here would sound unnatural in normal Indonesian. Dari usually means from, not the English of in this kind of phrase.

Literally, yes, the parts are:

• ruang = room/space
• tamu = guest

But as a fixed expression, ruang tamu means living room or sitting room, not guest bedroom.

So you should learn ruang tamu as a set phrase.

Indonesian does not have articles like the, a, or an.

Whether something is definite or indefinite is usually understood from context.

So:

• pojok ruang tamu can mean the corner of the living room
• dua toples biskuit can mean two jars of biscuits

If the speaker wanted to make something more specifically definite, they might use context, word order, or words like itu.

For example:

• dua toples biskuit itu = those/the two biscuit jars

But in your sentence, the plain form is completely normal.

Good question. Indonesian sometimes uses classifiers, such as buah, orang, ekor, and so on. But they are often optional in everyday speech, especially when the noun itself is already clear.

So these are both possible:

• dua toples biskuit
• dua buah toples biskuit

The version without buah is very natural and common.

Also, toples itself already names the container, so the meaning is clear: two jars of biscuits.

It can mean either one or more, depending on context.

Indonesian nouns usually do not change form for singular vs. plural.

So:

• biskuit = biscuit / biscuits
• toples biskuit = jar of biscuits / biscuit jar

In this sentence, because there are two jars, it is natural to understand biskuit as biscuits in general, not just one biscuit.

Untuk means for, and tamu means guest or guests.

So untuk tamu means:

• for guests
• intended for guests

It tells us the purpose of the biscuits: they are there to be served to visitors.

Because Indonesian nouns do not have to show singular/plural, tamu here can mean guest or guests, but in context for guests is the most natural interpretation.

In practice, listeners will almost certainly understand it as describing the biscuits, or more broadly the jars of biscuits as something intended for guests.

So the meaning is:

There are two jars of biscuits for guests in the corner of the living room.

It does not normally mean that the jars themselves are special jars made for guests in some strange way. Context makes the intended meaning clear.

Because di pojok ruang tamu is one noun phrase:

• di = in/at
• pojok ruang tamu = the corner of the living room

You only need di once, before the whole location phrase.

Compare:

• di pojok ruang tamu = in the corner of the living room
• not di pojok di ruang tamu

The second version would sound wrong for this meaning.

They are similar, and both can mean corner, but they are not always used in exactly the same way.

• pojok is very common for a physical corner or a corner area of a room.
• sudut can also mean corner, but it can additionally mean angle in a geometric or figurative sense.

In this sentence, pojok ruang tamu sounds very natural for the corner of the living room.

Word-for-word, you can break it down like this:

• Di = in/at
• pojok = corner
• ruang tamu = living room
• ada = there is/are
• dua = two
• toples = jars
• biskuit = biscuits
• untuk = for
• tamu = guest(s)

But a natural English translation needs to rearrange things:

In the corner of the living room, there are two jars of biscuits for guests.

That is a good example of how Indonesian and English often organize noun phrases differently.