You didn't say which year, engine/transmission combination.
Are you sure the sound isn't the starter? With all the other items having problems, maybe it is the key switch messed up keeping the starter engaged and other items turned off. If it isn't the starter, then I would wonder about the shifter messed up trying to engage reverse with the forward gears. And along with that the tranny sensors sending an unknown signal to the ECU that it can't handle and causing the other problems. Those are just my two guesses.