Send me the best pics you can on the dings. It's roughly 800-1200 bux. I wouldn't worry about the jams man unless you were changing the color. The tape line would be on the edge of the door and no one would notice it. If your for sure about doing them, then that's fine. I just wanted to give my opinion and save you some money.
Depends on brand. You could go to oreillys and get a gallon of paint for 50 bux. Solid colors are cheaper than a metallic or pearl. Red is the most expensive.