Check out Junkyard Digs on Youtube. You'll have to spend some time searching, but I have seen them achieve some impressive results on cars that were abandoned in fields and barns with common tools/products. For example, Junkyard Digs used Comet scrub powder to revive the original, heavily-oxidized paint on a 1967 Bonneville--followed by the typical compounds and waxes, of course. You can achieve a LOT with a little bit of product and a lot of elbow grease, especially when rust is minimal.
There's probably more relevant content out there specific to your objectives, but above can give you a start/some ideas. A 1987 Toyota Pickup did not come new with the highest quality paint job, so as long as your expectations of end result are less than say a brand new 1967 Pontiac or 1997 Lexus, you'll probably be happy in the end :)