You bought a vehicle, only being TOLD what was under the hood. Im sorry, but that sounds terrible. The engine info is located on the emissions sticker under the hood. Its a white, rectangular shaped sticker with black lettering. And when it comes to simple electrical problems, ALWAYS start with the fuses.Work from the 12v source, out to the powered device. ie:electric lock switch, from switch to motor. Good Haynes manual will help also. Good luck.