Answer:
What has to be broken before you can use it?
I contain six letters, minus one and you got twelve. What am I?
Whoever makes it, tells it not. Whoever takes it, knows it not. Whoever knows it, wants it not. What am I?
Long and thin red within with a nail at the end.
I am the key that is the hardest to turn
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.