Answer:
I am one with eight to spare, lest I lose my one. I'm not a number. What am I?
I am owned by every man, though my length differs. Their wives use me after getting married. What am I?
I am a delicious way of representing data.
I am a mountain at night meadow at day
Curtail me thrice I am a youth; behead me once a snake; complete I'm often used in truth when certain steps you'd take.
Walk on the living, they don't even mumble. Walk on the dead, they mutter and grumble.