Answer:
You need a key to receive an answer from me. The answer you'll find is straight from your mind. What is it?
I go around in circles, but always straight ahead. Never complain, no matter where I am led.
When it comes in, From sea to shore, Twenty paces you'll see, No less, no more.
Golden treasure I contain, Guarded by hundreds and thousands. Stored in a labyrinth where no man walks, Yet men come often to seize my gold. By smoke I am overcome and robbed, then left to build my treasure anew
Look into my face and I'm everybody. Scratch my back and I'm nobody.
People take me on walks and I run and have fun. What am I?