Answer:
I am partially baked. I am not completely lit. I am a portion of the moon. I am lesser than full wit. I am a divider of the hour. I am not a total lie. I am a sibling through one parent.
What has a head and a tail, but no body or legs?
I cause involuntary movements in your vehicle
I am the book one can never finish reading
I am a certain five-letter word and become shorter when you add two letters to me. What am I?
Of these things - I have two. One for me - and one for you. And when you ask about the price, I simply smile and nod twice.