Ben in this context, is the 'other' part of a house. In days of yore houses with 2 rooms, were called a 'But and Ben'
Nowadays tae gang ben the hoose, is to go into the back room/s
Hurl is a difficult word. you can get a hurl on a trolley, i.e. a lift, or you can be hurled around in a barrow or similar.
It's to go for a ride really.
Bedstock is a wooden beam that runs across a bed, I assume in this case it had hooks on it, where the keys were hung
Bed Stock
You may find it here if you search