If a vehicle crashes or someone crashes it, it is involved in an accident.

Lamppost is a tall post with a light at the side of roads and in other public places.

Garage is a building where a car is kept, built next to or as part of a house.
A garage is also a place where you can have your car repaired.

Attendant is someone whose job is to be in a place and help visitors or customers.

Repair means to make it work again.