Sure, but I was asking about the "'nt'd" at the end of all that.

As a British English speaker, I can't even guess what verb they're trying to say that they wouldn't / couldn't have done.

Sorry, I should have made clear I was responding only to this part of your message:

  I guess "I'd'nt've" means "I don't have"

I think it meant 'I would not have', not "I don't have".