No crank no start after overheating, OBD2 faulty or ECU faulty

One last thing, while I have the car like this, do you have any suggestions on what I should be looking and or replacing other than what's been said? Does the crank have a gasket? Do I have to replace the crank bolt as well? I'm just making notes on the extra things that need to be replaced. Also, I'm curious and would like to know not just for what I'm currently working on, but anything related to this car so are there bolts, pulleys, gaskets tensioners etc. That can only be used once. Meaning since I removed things from its original place be a bolt, gasket, harmonic balancer, etc, does it have to be replaced if yes what are they? So, I can start familiarizing myself with them and I just don't want to have to take everything apart again. Lol

So, I'm really struggling with this crank bolt. I tried the bump start but that isn't working. I put a weaker end impact gun pushing 120 ft/lbs of torque to nothing. I tried putting an extension to reach outside the wheel hub and added a cheater bar to it and it won't budge. I'm turning counterclockwise while this homemade pulley lock thing I made that screws into the whole of the crank pulley holds onto the control arm as I turn clockwise it hold but nothing gives. Is there something else I can do before I get spend bigger money on an impact gun I won't need so much? How much torque should the impact gun have for it to work?