Just to be safe always check the obvious, make sure you can rotate the engine over with a socket/ratchet to be sure it is not seized, then check to be sure the hot wire to the solenoid ( big wire to stud on solenoid) has battery power with key in run position, check for battery power on the starter solenoid (small wire to activate solenoid) with the key turned to start the vehicle, , there should be power at the solenoid to engage the starter motor, if no power on the large wire trace back to find fault, same for the solenoid power from key, but from your statement of a click when trying to start sounds like solenoid is engaging . so either the power to the starter from battery seems to be open or to low voltage getting to starter from corroded wires, or the engine could be seized.