First, why get your kitten declawed? It is a painful procedure, and is not really necessary, as kittens can be taught to use scratching posts, and some people even just trim their cat's nails, and have no problem. And if not done exactly right, it can continue to be painful, and lead to sore paws, behavioral problems and an unwillingness to use the litterbox, too.

You do need to get those vaccinations, it is in the best interest of your cat for its future. While right now your kittens may not encounter other animals, you never know when you may have to board them somewhere in any emergency, or they may accidentally get out and encounter an affected animal, or even run into one at the vet's office or anything. It is a "better safe than sorry" thing. I would save the money by not getting it declawed, and get the vaccines instead!