If he lives in a house then go to edit town mode and evict him out of his house and into yours. Or you can wait until you get married and then the game will give you the option to move him in.
Chat with our AI personalities
yes you can
You have to go to a computer, phone, or newspaper and then click the "move" option.
Sims have to go potty.
when they move out, they will enter The Clipboard (the place where the Sims are kept after you've made them but before you move them into a house. From there, you can move them into a new lot to play them.
Not that i know of but you can be as soon as they are teens you can