I know I'm a little late but do you plan on doing it or having it professionally done? Maaco will probably do it for 500-800 for their cheapest job which I have heard they have been getting better. It only goes up from there.
I painted my entire camaro for $500 for paint and supplies. Used my buddies stuff because I didn't have a compressor and gun at the time. It is a pretty good quality paint, I know a few hot rodders who bought it and paid somebody to do the paint job and it cost them $5,000+.
Not sure about your area but I would say $400 on the low end to $1000 high end if you do it yourself. A vehicle that is white is the easiest to paint another color. The darker the color, the more paint it will take to make it look right. Unless you take it down to bare metal everywhere. Which is A LOT of work.
Here's my camaro so you can see the size and compare it to the area you need/want to cover with your truck. The cab and front end of the truck will be about equivalent to my entire car as far as amount of paint needed. I used a 2:1 paint reducer paint. I think I bought 4 quarts and had some left over.
