first thing I would do is drop the gas tank and clean it out it isn't necessary but depending if it wasn't put away dry it is not good for the truck. Gas likes to absorb water. I would change the fuel filter and check the hoses: radiator, power steering if equipped, vacuum, and the other various rubber hoses that are likely to have rotted change them if necessary. After eleven years you will need a new battery and most likely tires although my grandfather's model A pick-up that was parked in 1960 still had tires that held air on it when I picked it up with my dad in 2009. After that I would change the fluids and it should be good to go.