Congratulations on your three additions to your family. They should all adapt to their new home soon.

Having them "fixed" when they are young is easier on them.
Please reconsider on having them de-clawed. This is barbaric and torture. If you are not familiar with the procedure, please research this. Also your kitties will have no way to protect themselves should they get outside.

Check into kitten/cat nail covers (like Soft Paws) which are far more humane and they are not very expensive.

Enjoy your babies!