Keys are expensive.They cost 700 ruppees! That was the same room in Level 8 you mentioned where i was stucked too..you cant moved that square of blocks to get out. Go ALL THE WAY BACK to the entrance of Level 8..Go up, right, down the stairs, then up. (b2)Use the wand to break the odd barrier and you'll be on your way..kill all enemies in the room to get keys.