Answer:
My first is a creature whose breeding is unclear. My second, a price you must pay. My whole can be found in the river of Time and refers to events of today.
Do what he says and you'll be fine, don't and you lose the game.
My first is in fish but no in snail. My second is in rabbit but no in tail. My third is in up but not in down. My fourth is in tiara but not in crown. My fifth is in tree you plainly see. My whole a food for you and me.
What is made of wood but can't be sawed?
I am the greatest teacher out of them all, but alas in the end I kill my pupils.
What language does a billboard speak?