If the truck hasn't run in a long time, you definitely do NOT want to turn it over right away. At best you probably have surface rust in the cylinders. You should do a search here for starting an engine that's been standing a while. If I recall, the concensus is that you should pull the plugs, squirt in some easing oil, and let it sit for a day or two.
If you score the cylinder walls trying to get it started, you could be facing a much bigger job shortly!
Brian
