if you have picked a responsible caring breeder, then your puppy should come with a diet sheet detailing all the food its had and will need, along with some of its own feed (enough to last a few days until you can get your own supply of same). It should also come with a sheet detailing what wormer it has had, and when it had it, and when it will need doing next time.
Other questions, depend entirely on a breeed (ie a slow maturing breed will have specific excercise requirements you will need to know about)....has the puppy been vaccinated or microchipped? Again depending on the breed....does