What to do with 2 week old pitbull puppy???

I was scammed by a breeder into thinking I was buying a 4 week old puppy that he said the mother refused to feed. I felt so bad and he was selling them at a flea market. Didn't want the puppy to go with someone that wouldn't care for him. Anyway, got him home and realized his ears aren't open yet from reading online this is suppose to happen around 3 weeks so guessing he is only bout 2 to 2.5 weeks old.
I have been feeding him special baby formula and he seems to do okay with it but is having really runny stools. Also we live in an area were Parvo is everywhere... Wondering if I need to wait til he is 6 weeks to give him shots?
I'm trying to care for him the best I can. Please any advise would be appreciated.

 

You must provide all the needs of the pup starting from the vaccinations up to his dog food. This is to ensure a healthy pup but the most important thing to have is TLC(tender, love and care).