Short Riddles and Answers

Question: What goes black when you buy it, red when you use it, and goes white when you throw it away?

Question: Made of ten but two we are havoc 5 and we are weak but all together but small we are strong.

Question: What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Question: A container that takes no keys,
but a golden delight lies within me.

What am I?

Question: We are twelve in the family. I am the second one, as well as the youngest.

Who am I?