Everyone else will probably give you the real good advice. I'll just give you a couple simple things...
1) Look underneath where the car is parked. If there are large oil stains, you may want to be concerned.
2) does the car start? does it run? can you drive it?
I'll leave the really good advice to the experts.
In all seriousness, just looking underneath the car and making sure there aren't any major leaks is a good thing, assuming it hasn't been moved at all. It's not something you would necessarily think of.