So how is the new kitty adjusting?
With kittens you want to make sure to keep them in a single room for up to two weeks, as they NEED to learn where their kitty box is; the more confused he gets, the more accidents he may have. So keep him in a smaller space, so he can learn exactly where it is.
He needs to be on a kitten food, or a good all stages type food; I fed brands like Felidae, Solid Gold, and Chicken Soup for the Cat Lover's Soul. Feed him free choice on the hard kibble; if they are fed free choice from a young age, they rarely over eat, and get obese.
Cats don't often drink enough water on their own, so to keep hairballs, especially, at bay, feed a canned food atleast once a day, or every other day; it doesn't have to be a huge feeding, just enough to help keep him hydrated, and hairballs to more of a minimum. You can also get a hairball control 'supplement' at any good pet store, and all you do is put a bit on his paw once a week.
Make sure he has enough scratch toys, and cat trees to keep him from scritching up your furniture; I NEVER declawed my cats, and always had 'well trained' felines; you just have to make sure there is enough 'kitty safe' furniture for him to focus on, and 'lace' those with catnip weekly. A good rule of thumb is atleast one scratch post PER room in your home. They don't all have to be expensive ones, just ones that will give him something to scratch on.
Interact with him on a daily basis, especially at night before you go to bed; get a laser pointer (always a cat favorite), and wear him out shortly before you are getting ready for bed. Because he is the only cat, you will want to keep him entertained, as he won't have anyone else to play with.
"The ideal horseman has the courage of a lion, the patience of a saint, and the hands of a woman..."