Never painted anything on a car!

I have a some projects going, I would like to paint some of the parts large and small myself. I have a trailer to paint, I have a chassis I would like to paint, and a number of other car parts. Is their a good book I could get to help get me going? How do you choose a beginners Paints gun kit?

How is this one on ebay, Part # (#200196303287). .

I also am looking at a hobby air pump fresh air set. I do have a decent abrasive blaster I plan to get more use out of.

Any help is appreciated.