There is a LOT more to it than what paint to use, that is more of a personal preference to some degree. There is prep work, body work, metal work, etc, then you need to completely dis-assemble the car, removing all of the trim, moldings, door and window seals, windows, most of the interior, all exterior body panels that bolt on, etc, to do a correct and complete color change. If you want to do it the cheap way, rub it down with dawn and a red scotch brite pad, dry it off, and mask off anything you don't want to paint black. Going to a different color, I would recommend using a sealer then applying the paint. There are countless brands of paint out there, some good, some not. You can decide how long you want it to last or what you want to pay , either of those will be your deciding factor. Next question is where do you plan to paint this car? Do you have a booth, garage, barn? Do you have the necessary tools to do the work needed, air compressor (generally need a 15 CFM or larger for painting), sanders, grinders, paint guns? And lastly but definitely not the least, do you have the needed safety equipment, N95 mask for sanding, charcoal style respirator for priming and painting (a supplied air system is probably better and safer)? Not being a butt head, just much more to it than point and shoot.
Kelly