The Ghosts in your Attic may be one of these critters. (Racoons have been living in my neighborhood and can be seen going in and out of an attic using a roof.)
The ghosts in the furnace clanging and banging may be the furnace kicking on or off..
The ghosts on your creaking floor boards are probably not ghosts or robbers but simply weird noises caused by heat shrinking or moisture expanding wood.
Photo: Skedaddle Humane Wildlife Control