Thats very dangerous, as you are aware. You need to make sure what ever is binding the throttle is fixed before you take it on the road again. Its a simple system, but if you are not very familiar I would take it to a shop (towed).
As others have said, make sure the pedal returns easily when depressed. If not, figure out why. Im pretty sure a '97 was a cable actuated throttle. It probably needs replaced, or the return spring is broken.
You mentioned you couldnt use the brake pedal??