Buying a house at auction that is occupied in NC

[Fred Nesvet]

I am interested in buying a house that was foreclosed on by the bank. Either the former owner or a tenant is still living in the house. The bank says that I would have to do the eviction if I purchase the house. If the occupant is a tenant would a lease that they signed with the former owner still have to be honored by me? What is the procedure to do an eviction, the costs, and the time it takes in NC? Any suggestions to prevent occupant from trashing the house if I start eviction?