How to deal with difficult tenant?

[Katon Pang]

I just had a difficult tenant move in recently and haven't been able to deal with his rebellious attitude and get him to listen what I asked. I have a 5 bedroom house and I live in one of them. I have 2 car garage and I park on one side and the other side I rented out to one of the tenants who has lived here for a while. I was clear to him that during the tour of the room and house that the parking is street parking, no parking on drive way (as it'll block cars parked in garage), and informing him that which streets he could park. Now he just parks there on driveway behind my car (my car is in garage), without asking or telling me, and refused to not parking there. He would move when I asked but that means every time I leave and back to my house. No where in the lease says garage or parking on driveway is provided or allowed. Even on my "room to rent" advertisement post said it's street parking. He even dared to ask me where in the lease says he can't park on the driveway! (Well, the lease didn't contain parking period. But I didn't have problem until now.) 

He is 19 yrs old (I'll never rent out to teenager again), said the garage and driveway is part of the house, and his lease is for the house and it is shared, while I told him that his lease is only for his bedroom not everything on the premise. 

Without bringing up the lease again and aggravate him even more as he wanted to talk to his attorney (according to what he said/presented he is a kid with rich parents with attorney), what some other ways to minimize the situation (ensuring no random security issue / damages on house and car), get my garage and driveway back, and get him to leave peacefully as soon as possible? Any suggestions on dealing with difficult tenants?    

This is 3 months lease ending end of Oct. And I leave my house 3am in the morning for work.