did I make the right choice buy acura 2002 over 225,000 miles on it? on 2002 Acura TL

Engine run smoothly but has no idea if it is still good car to keep. Just bought on 1/29/12. Can I still return to the dealer. What do I need to do for now for the car to have it safely driving?

Asked by for the 2002 Acura TL