Answer:
I am two-faced but bear only one. I have no legs but travel widely. Men spill much blood over me. Kings leave their imprint on me. I have greatest power when given away yet lust for me keeps me locked away.
What can run but never walks licks but never talks has a bed but never sleeps has a mouth but never eats?
I love spinach.
I pass before the sun but make no shadow. What am I?
I am a busy worker who is a water mammal.
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.