What Am I Riddles

Question: Travel a mile and I will change.
Travel a million and I will end as I started.

What am I?

Question: My first is often at the front door.
My second is found in the cereal family.
My third is what most people want.
My whole is one of the united states.

What am I?

Question: Draw, fire, or fill me;
I'm still empty.

What am I?

Question: People pick me, and watch me until they give me power. Then they don't stare in my eyes. What am I?

Question: You can find them on plants. One is for music. Most have two. Someone may ask you for yours. Politely, you lend yours to another. Only if you are good you can play by it.