Oh man are you going to have your hands full! Although, just my opinion, i think it will be easier to get your new baby adjusted to the dog than Wallace.
First, about the floors, my kitty had the same problem when i first brought him home. Rugs will help, but if that ruins your decor, don't worry, they get used to it.
Second, you'd better watch kitty closely, it's not good that he's not interested in the food. If he goes a whole day without eating i'd call the vet asap.
BTW, is Wallace fixed? If not, that could be an issue to. Non neutred cats can be very agressive, posessive and territorial, especially with another male cat in the house.
The best way to get them introduced is to keep new kitty locked up, only bring him out to "socialize" when you are around to carefully monitor them. Get a towel and rub it all over new kitty, then bring it out to Wallace, let him sniff it and rub it all over him. Keep doing this. That will get them used to each other.
Also, don't forget Wallace. I'm sure it's tempting to spend all your time and praises on new kitty, but that will get Wallace quite jealous. So be sure to play and praise him too, ALOT. Almost more than new kitty, just so he knows he's not being replaced.
And hurry up and get new pics of you kitty here! I want to see! lol.