Answer:
I may be made of metal bone or wood and have many teeth. My bite hurts no one and the ladies love me.
What is always in front of you but can't be seen?
When it comes to me you go on red and stop on green.
You used to come to me for all sorts of information and knowledge before the internet was born
In a tunnel of darkness lies a beast of iron. I can only attack when pulled back. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?