Get a shop manual, check out the brakes, rebuild the brakes and make sure the brakes work!
BRAKES
GAS
HOSES AND BELTS
TIRES
FAMILIARIZE YOURSELF WITH THE TRUCK
CHECK THE LIGHTS AND WIRING (MICE LIKE WIRES)
LUBE ALL FITTINGS, RE-PACK WHEEL BEARINGS
CHANGE ANTI-FREEZE
GIVE IT A TUNE UP * REPLACE PLUGS AND WIRES.