Only buy a quality kit, OE GM, Felpro, etc. you only want to do this once, but yes a kit that contains those parts. New head bolts will be needed as they are one time use only. Also a degree wheel is needed to torque the head bolts, and a tool is required to rotate the water pump when tightening the timing belt.
timing belt kit includes water pump, belt, tensioner, pulley, etc. whatever parts are specific to your year car.