It might and I have done this, but even if it does the engine will need to be disassembled for repair, this just makes it much easier.
Nothing, it sits there unable to do anything
When you say a engine is locked, many scenarios can come into play. If the vehicle has been running recently and has A/C, make sure the compressor is not froze up as the starter will not turn over an...
you go into your car and unlock it
No. If it seizes because of overheating, it needs time to cool off, then add oil and/or water if necessary.