Answer:
I come with a train and go with a train and the train doesn't need me but can't go without me.
You heard me before and then again. Afterward I die until you call me again.
With a halo of water and a tongue of wood, stone as skin long I stood. What am I?
I'm blue, but when you see me I'm red. You don't see me too often. I'm there for you if you're hurt, but I'm good for you. What am I?
I am commonly ate before I'm born and after I'm dead.
What language does a billboard speak?