Answer:
I am the tool, for inspiring many. Buy me in the store, for not much more than a penny. Don't overuse me, or my usefulness will go.
What is put on a table, cut, but never eaten?
What binds two people yet touches only one?
Thousands lay up gold within this house, But no man made it. Spears past counting guard this house, But no man wards it.
You’ll have me at night and if you remove the first letter I denote the top, such as on a train
I fly to any foreign parts assisted by my spreading wings. My body holds an hundred hearts Nay I will tell you stranger things when I am not in haste I ride and then I mend my pace anon.