Answer:
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.
I am a fruit with seed on the outside.
I am the beginning of the end and the end of time and space. I am essential to creation and I surround every place.
I may be made of metal bone or wood and have many teeth. My bite hurts no one and the ladies love me.
I can be thin but not fat; in your body but never on your placemat. I'm always better when I'm fresh but you'll never see me in the flesh.
A little house full of meat, no door to go in and eat.