Answer:
My life can be measured in hours, I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
You’ll have me at night and if you remove the first letter I denote the top, such as on a train
Look into my face and I'm everybody. Scratch my back and I'm nobody.
The eight of us move forth and back. To protect our king from the foes attack.
You throw away the outside and cook the inside. Then you eat the outside and throw away the inside. What did you eat?
A first job for many kids, this could be described as "Media Distribution Management.