Answer:
In many hall ways you would stand if not with me in hand.
I am black when you buy me red when you use me when I turn white you know itβs time to throw me away.
I am one with eight to spare, lest I lose my one. I'm not a number. What am I?
In my life I must bare, my bloodline I must share. What am I?
What has a neck but no head?
I always have to work with something in my eye. What am I?