Refuses to talk to us at times

We have a newly adopted 17 year old son that has been in our home over two years.
1. What do you do when he just won't talk refuses to acknowledge or do anything. 2. Won't talk and refuses to do chores (or anything). 3. All of his stuff is taken and we have nothing else to offer good or bad that he responds to (he does not have video games, airsoft guns, iphone-iphone was taken because he uses it for inappropriate things and to play video games non-stop)-he may watch TV with us though or an approved show-but he just won't talk to us now. Gives long periods of silent treatment. 4. He violates every single thing he can, too much to keep up with in terms of consequences. 5. Just says he will stay in his room and doesn't have to do anything.