Chris, good on you for giving the little guy a home!!
You only need to lock him in the bathroom for a day or two while you are gone to make sure he uses the litter box, then he can find it on his own.
Either leave the food and water in there too, or move it to your kitchen. I have always fed my cats dry cat food, the canned stuff stinks too much as far as I'm concerned. I have one of those tower things that holds a small bag of food, and they eat whenever they want.
I have TP shedders...Puffer (

) and Bailey shred with their teeth, the other two could care less about it. Mine have had their front claws removed, so I don't have to worry about damage or them clawing their way up the furniture.
Cats are difficult to contain...they can find their way into or over all kinds of situations. If their whiskers "fit" through a space, they think their bodies will too. He will most likely want to sleep with you too. Make sure not to leave any food out on the kitchen counter. None of the girls grab anything off of my counters, but I did have one before that would grab baggies of cookies or biscuits and shred them all over the place.
If you are going to keep him, I would recommend that you get quickly get him neutered. I have only had one male who was older than we were told, when he was brought into the house. He was not declawed or neutered and he was a holy terror. He clawed up a leather wingback chair and sliced up the sides of a cherry armoire, and I would find him sitting on top of the cornice boards after he climbed up the drapes. He also "sprayed" his territory all over the place. After about a month of this, he went to a new home, I got new hardwood floors in my LR, DR and foyer and new carpet all upstairs. The ex didn't bring home any more "surprise" animals after that.....