Can someone tell me what vaccines my 6 month old puppy needs?

Your vet will give your puppy all the vaccinations relevant to its age.
Just book an appointment and say you need 6 month vaccinations.

Has your puppy had any vaccines at all?

If not, chances are he will need to go to the vet 3 separate times for vaccines, to build up immunity.

Every vet is different, but most will have you come in, and give you the dapp/rabies vaccine. Then you may have to come back 1-2 more times to booster the dapp vaccine.