zǎocānquàn hé fángkǎ dōu zài zhèlǐ.

都 means both or all.

In 早餐券和房卡都在这里, it shows that the statement applies to both items:

• 早餐券 = breakfast voucher
• 房卡 = room card / key card

So the structure is:

• A 和 B 都 + predicate

Here, the predicate is 在这里.

So the sentence means that both the breakfast voucher and the room card are here.

Yes, you can say:

• 早餐券和房卡在这里。

This is still grammatical and natural. It means The breakfast voucher and the room card are here.

Adding 都 makes the meaning a little more explicit: both of them are here. It often sounds slightly more complete when you are talking about two or more listed things.

So:

• 有都 = clearer emphasis on both/all
• 没有都 = still fine, but less emphasis

Because in Mandarin, location is usually expressed with 在, not with 是.

For identity, Mandarin often uses 是:

• 这是房卡。 = This is the room card.

For location, Mandarin usually uses:

• 房卡在这里。 = The room card is here.

So in your sentence, 在这里 is the normal way to say is here / is located here.

English uses is for both identity and location, but Mandarin usually separates these ideas:

• 是 = to be, in the sense of equals / is identified as
• 在 = to be at / to be located in

Here, 在 is acting like the main verb, meaning to be located at.

So:

• 房卡在这里 = The room card is here.
• literally: The room card is located here.

In other sentences, 在 can also behave more like a preposition, depending on the structure. But in a simple sentence like this one, it is easiest and most useful to understand 在 as the main location verb.

Mandarin commonly follows this pattern:

• subject + 都 + predicate

Here:

• 早餐券和房卡 = subject
• 都 = both / all
• 在这里 = are here

So the sentence is built like this:

• [Breakfast voucher and room card] [both] [are here].

This is a very common Mandarin pattern. For example:

• 我和他都喜欢咖啡。 = He and I both like coffee.
• 这些东西都在桌子上。 = These things are all on the table.

Here, 和 means and.

So:

• 早餐券和房卡 = the breakfast voucher and the room card

Yes, in many everyday situations, you can also use 跟:

• 早餐券跟房卡都在这里。

This also sounds natural in speech.

A simple way to think about it:

• 和 = neutral, very common, good in both speech and writing
• 跟 = also common, often a bit more conversational

For a learner, 和 is the safest default choice for and.

Both mean here.

• 这里 is a bit more standard and works well everywhere.
• 这儿 is more colloquial, especially in northern speech, including Beijing-style Mandarin.

So these are both possible:

• 都在这里。
• 都在这儿。

The meaning is the same. As a learner, 这里 is a very good default because it is clear and widely understood.

In 早餐券, 券 is pronounced quàn.

So:

• 早餐券 = zǎocānquàn

This is important because 券 can have different pronunciations in different words. In words meaning a ticket, voucher, or coupon, it is commonly pronounced quàn.

So here it means something like a breakfast voucher or breakfast coupon.

Yes. Literally:

• 房 = room
• 卡 = card

In a hotel context, 房卡 usually means the key card for your room.

So although the literal meaning is room card, the natural English idea is usually room key card or simply key card.

No. You do not need a measure word here.

That is because the sentence is simply naming two specific things:

• 早餐券
• 房卡

When you are just listing nouns like this, a measure word is not needed.

You would use a measure word in sentences like:

• 一张早餐券 = one breakfast voucher
• 一张房卡 = one room card

But in 早餐券和房卡都在这里, you are not counting them; you are just mentioning them as the things that are here.