The rattle is probably the a-pipe rattle that many of these cars get. Could also be one of the heat shields around the cat or b-pipe. All are age related. Fairly easy to diagnose and fix usually.
What DarkDB1 said about fixing the paint. Pretty straightforward.
Idle problem - I'd look at the IACV first, but there are a few things that could be.
GOT PICS? What color?