What Am I Riddles

Question: What has 4 fingers and a thumb, but is not living?

Question: I fasten to walk,
and unfasten to stop.

What am I?

Question: What heavy seven letter word can you take two away from and be left with eight?

Question: What runs around the house but doesn't move?

Question: My first is often at the front door.
My second is found in the cereal family.
My third is what most people want.
My whole is one of the united states.

What am I?