Hi there! All I can say about the console version of this game is that it doesn't live up to the PC version. Regardless...
The best way I can figure to do what you want, is a little bit of a process. This version doesn't have the ability (as far as I can tell) to just move a sim out of the house and put him in another house in the neighborhood. Once someone moves out of the household you're controlling, they're deleted from the game. For-ev-er. Also, please read all of this before you decide to do it. Once you've read it you might just find it's easier to kill the sims you don't want in the house.
So this process, assuming you're prepared to lose your YA and his wife and continue on without him in the household you've got:
1. From the "Town View" option, click on your house and click the "Copy House" option. I'm assuming you want to keep the house you've got cause you like it or it's just the way you want it. And once you decide to move them, there is no option to just leave the house the way it is. So this will save a copy of your house to your game library exactly the way it is. I advise labeling it so you know beyond a shadow of a doubt that it's the house you had before.
2. Once you've saved a copy of the house, you'll be moving the sims you want to keep to another house. It's just for a minute. To do this, click on a sim you want to keep, any adult, click "Cell Phone", then "Move". A window will pop up with options for each sim. The sim using the option will not be able to be moved, (s)he is going to the new house whether they like it or not. As for the other sims, you have the option to either kick them out or leave them at the house they're in, which is kind of a pointless option because either way they're completely deleted from the game. So it doesn't matter which one you pick. Just to make things easy let's just say kick all the unwanted sims out. Then you can either keep your furniture or sell it. Just pick one.
3. So you've moved the sims you want to another house right? Now just go on and move them right back into your old house. It should still be the way you left it, but without furniture. So now, go to the "Town View" and click on the house, then click "Replace House". It should pull up a few options and the house you saved should be in there. Know that once you do this it will remove all wishes from each sim except for their lifetime wish.
There! You should now have the family you wanted living in your house. It really sucks that you won't be able to interact with the sims that got kicked out, but hey, at least they're out of the house. Right? Right?!
This version of the game obviously has some needed work. Seems the creators overlooked a few things when they translated it. Anyways, I hope this helps.
