We just bought a 2001 Tacoma for our son from an auction. We were told the alarm didn't work. We didn't have any problems for about two weeks. Now, we can't turn on the truck. The alarm keeps going off. We disconnected the alarm from the battery so we wouldn't go crazy with the noise but we can't figure out how to reset the alarm so the truck will start. I know nothing about cars so I need some help!