My enclave overheated and shut off

What is your question?

My enclave was driven with no oil and water so it overheated and shut off. I was told to have the drivers park it and have it towed but the mechanics that towed it did not have the knowledge to fix it. When it was turned on it shook violently then shuts off after a minute then wont turn on again. Please tell me whats wrong and how much it'll be to fix