Answer:
I come with a train and go with a train and the train doesn't need me but can't go without me.
I can wake you up in the morning but I require no electricity or winding. What am I?
I cannot be felt, seen or touched. Yet I can be found in everybody. My existence is always in debate, yet I have my own style of music. What am I?
I have fangs and enjoy piecing holes with a single bite.
I move without wings Between silken string I leave as you find My substance behind.
Give it food and it will live, give it water and it will die.