Answer:
When it comes to me you go on red and stop on green.
When I am caught, I am thrown away. When I escape, you itch all day. What am I?
If you lose me, you may cause people around you to lose me too. What am I?
I am your most powerful weapon; I come before your eyes. I help you seek the truth, yet I often give you lies. What am I?
What can travel around the world while staying in a corner?
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.