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 am I?
When it comes to me you go on red and stop on green.
When I live I cry if you don't kill me I'll die.
What is easy to get into but hard to get out of?
I always have to work with something in my eye. What am I?
Give it food and it will live, give it water and it will die.