Also... (ran out of time to edit apparently! lol)
As far as chewing, your little guy WILL definitely be wanting something to chew on. I got Kingston a little furry "buddy" from Petsmart (think the long weiner dog looking things lol) and he loves it. I think he actually likes it so much that he doesn't want to chew it though lol. We get him the "Freshies" little dog bones (help with his breath) and this flexible chew bone that helps puppies teethe (it'll say it right on the package :P).
Kingston was my first pup I got on my own, and he's been actually fairly easy! They're not really high maintenance since they eat so little (they do love water though!), don't need a whole lot of exercise (though we do talk him on a walk once/day), and if you stay with the "puppy cut" they don't need a whole lot of grooming. It's muddy where we're at now so we do bathe him once every few days, but he really likes his baths and he just sits there patiently till we're done
As far as the shots go, most vets require two sets of puppy shots, then rabies and neutering/spaying if you want. Plus if you want flea/tick guard, that's usually it's own separate thing... it does get kind of pricey, but once they get it done then they don't need their next shots for another year, so it's not really so bad. When you first take him to the vet he'll lay everything out for you, no worries
Kingston's previous owner wasn't home throughout the day so she put up a baby-caged area and set him up a potty area (pee-pads), a food/water area and a play area. He did quite well. In Jan my BF and I are going back to school/working full time so Kingston will have some free time again. We're going to attempt to litterbox train him, so I will definitely let you know how that goes! Potty training yorkies can be difficult because the breed is just so darn stubborn! But what I found was if you kept him tied to his leash and then tied the leash to you, it really helped. You not only trained him to be your little shadow but you also learn to pick up his cues on when he needs to go outside.
Good luck hun, you'll do great! What a great xmas present