入り口にありますって英語でなんて言うの？

It's very natural to use 'You' when giving directions, although the second sentence in the passive form is also OK, if a little formal and impersonal. "If you go straight on for 10 minutes, you'll find the post office on the right."

Two examples both with noun at start followed by verb is and finished with prepositions telling you where,in the entrance and at the front of the building

Both of these phrases are giving a location to the person asking the question (front). If there is only one entrance to the building an you know the person has came in through it, you can instruct the person to "go back where you came into the building" meaning you are referring to the entrance of the store.

An 'entrance' is where you 'enter' a building so you can also say 'as/where you come in' this would mean the same thing To be 'located' means where something is (the location) 'You'll find the ATM at the entrance' is another way to say this

To describe where something is, Americans commonly use the words "at", "by", and "near". Also when we use the word "front" to describe a place, it is commonly associated with the entrance. This can also be said when someone says "by the door".

Entrance is how you say the area where you enter a building. It is acceptable to either say at the entrance or to say right, or immediately at the place, where you enter the building. You can also say that once a person enters, or goes into a building, the ATM will be there.

Native speakers will say like this: “The ATM is at the entrance”. There are lots of other ways to say it, but this one is the most accurate and most commonly used. Here is an example on how to use this in a conversation: A: Excuse me, could you tell me where the ATM is? B: It is at the entrance.