Answer:
When it comes to me, you go on red and stop on green. What am I?
I have a ring but no fingers. I used to stay still all the time but nowadays I follow you around.
A man shaves several times a day, yet he still has a beard. Who is this man?
I cover what's real; hide what is true, but sometimes bring out the courage in you. What am I?
I was was before was was was.
Black we are and much admired. Many seek us if they are tired. We tire the horse, and comfort man, and turn White when we've fulfilled your plan.