Answer:
I am a box that holds keys without locks, yet they can unlock your soul.
Different lights do make me strange, thus into different sizes I will change
Mobsters judge the quality of a vehicle by the size of this
If Teresa’s daughter is my daughter’s mother, who am I to Teresa?
What has three feet but no arms or legs?
I always murmur but never talk. Always run but never walk. I have a bed but never sleep, have a mouth but never speak. What am I?