Maaco might be the best route for an inexpensive coat of paint. I put several cars through them over the years and was pleased with the results. I'd do my own prep and some masking, so all they had to do was mask the windows and non-removeable trim then spray the car.

If you want to do your own painting, Tractor Supply Company carries an inexpensive line of gloss enamel meant for farm implements. It would probably look OK on a street vehicle.