Potty Training an Abused Adult Dog?

9 months ago a stay Lab, mixed with something else he is not a full blood lab, with a tag and collar was found outside our house. The phone number and address had been scratched off leaving only his name available. He has not been allowed inside the house. My father doesn't like dogs inside. He has been outside the past nine months.

I am moving and would like him to be an inside dog. He is very hyper, but I believe that is because he has been attention starved. I would rather not kennel him because of how large he is. I forgot to mention that while he has been outside no one has struck him and only given him love so he is not as skittish as he used to be. I have read not to make him smell and not to spank him. I wouldn't want to do that anyway for fear of bringing back it's skittishness. How could I go about potty training?

By Duster