HELP: Doors Won't Unlock and Car Won't Start from Inside Car&#, 1994 Celica GT - Alarm? Locks? Electrical? Please Help! Options

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I am having some crazy problems with my 1994 Celica GT. I think the best thing is to simply tell a short story about the issue. Basically, my wife drove the Celica to work the other day and when she arrived and turned the car off, the doors would not unlock by pressing the unlock/lock switch, by using the remote, and the switches/locks wouldn't budge when she tried to manually 'flip' them. The car would also not start. Luckily, she is tiny and was able to lower the backseat, pop the trunk, and climb out of the trunk!!! She then had to unlock the car with the key from the outside of the car. Everything was fine again, but just today it happened again! Anyone have any idea what this could be about and how to fix it? Toyota had no idea. The factory alarm possibly? Please HELP!