change the lock barrel if no immobilizer, or some pro locksmith can configure a new key with a key guage device. with immobilizer you can go back to SC and get the key immobilizer reprogrammed

lelong car are usually not worth it, unless you can self repair and want to flip i. most already no money to pay bank before kena tarik so usuallyno maintainence done on the car, later transmission or engine kong you headache