Answer:
I must be broken before you can use me.
I am black when you buy me, red when you use me. When I turn white, you know it's time to throw me away. What am I?
A dagger thrust at my own heart dictates the way I'm swayed. Left I stand and right I yield to the twisting of the blade. What am I?
I run smoother than any rhyme, I love to fall but cannot climb. What am I?
I belong to everyone. Sometimes make you happy sometimes make you sad. I will never end until the day you do.
A little house full of meat, no door to go in and eat.