Anti theft reset?

I lost the key fob and cannot disable the Anti-Theft.

I called and had a locksmith come out and he said he could not fix it.

He had to call said I had to call mechanic to fix the door locks.

I don't know the codes.

Alarm went off awhile back during big storm. Did not even know I had an alarm as I have no clicker, etc. Finally disabled horn and have not had any problems until last night (although anti theft light flashes on dash quite often) got in last night all lights etc, came on but would not turn over. Lights flashing on and off, neighbor came and finally got lights to quit. Said my battery terminals and cables toast? Changed positive terminal. Completely drained ever since. Nothing, tried to jump. I was told I have a direct short is doing something on end of other cables to other vehicle while trying to jump. Told I need to have the anti theft disabled? Please help I am at a loss.

I just left my house and he took the anti theft off my car but it's still not starting.

Mechanic just left my house.

The starter does engage but does not do nothing.

No security or theft light on at all.

I can hear the fuel pump but the car does not crank. It's still like if the anti-theft is still on.

The only thing that turns on is the fuel pump. The car will not start at all.