Answer:
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.
I'm the start of eternity and the end of space. There are two of me in heaven and one in hell.
They come in many varieties: Red, Black, Dead, and Caspian to name a few.
They are the group who manages the winged engines of war.
I have a ring, but no hands. I used to be plugged into the wall but now I follow you every where. What am I?
I am free the first time and second time but the third time is going to cost you money.