do they ID you at the entrance?

U pay 5 dollars per adult and if u have kids like ages of 5 till 15 or more they charge both of them as one

If by ID you mean a driver's license or state ID, I would say no, but you are required to pay $5 token for each person, babies exempted.

I didn't give an ID at entrance but it does cost per car.

Yes. If i am not wrong $15 per car.

Yes