Buying a used Deville; how to; HELP?! First of I would like to say that I'm sorry if this sort of thing has been posted already in the past; I must of missed it. Also, I am inexperienced when it comes to cars, so work with me.

Okay, so I am looking into buying a (used) 2002 Cadillac Deville. Here are my questions:

1. What should I look at (specifically) when it comes to buying this car (like common problems, and tell tale signs of trouble)?
2. Once I get it home, what are the first this I should do to this car (like should I flush the coolant, and if so, what brand do you recommend. Or, anything else that you can think of)?
3. What long term maintenance do you suggest that I do so I can get the most out of my car?

---If possible, please keep answers as step by step and as detailed/beginner orientated as possible




Thanks for all your help, I really appreciate it,
Ben