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 weightless but it needs two person to hold it?
Once they sailed the sea, now they surf the web
who do you think you know but sometimes you don't
I always run but never walk, I sometimes sing but cannot talk, No head on which a hat to place, You always look me in the face.
What is always coming but never arrives?