It all depends on what you are going to have painted. If you are going to have it painted the same color then you should expect to pay anywhere from $2,000 - $3,000. If you plan to have the entire color changed then add another $1,500 - $2,000 to that total above. AND...if you're going to have some custom body work done then add another $3,000 - $5,000.
Paint jobs are really dependent on the body shop. Some are good and some are horrible. Definitely do your homework on body shops. All are not created equal!