Answer:
People need me yet they give me away every day.
Taken from a mine and then locked up in a wooden case. I am used by students everyday.
I direct you from outer space.
I have six faces but not even one body connected, 21 eyes in total but cannot see. What am I?
Travel a mile and I will change, travel a million and I will end as I started. What am I?
Those with eyes bigger than their stomach will definitely leave the restaurant with one of them. It is named after a house pet as well.