1. find key NE of the house, and use it to enter the door in the NW part (entering other door = killed by the thieves).
spoiler ...............
go to the archers guild after you free the hostages. talk to the dad, he'll tell you that there's stuff in his room in a chest. key to the chest is in a locked cupboard, the key to that is on the leader of the thieves, Raven (be at least lvl 20)
hope this helps!
