Answer:
Although I may have eyes I cannot see. I have a round brown face with lots of acne.
I am one small little piece of paper yet sometimes hold lots of value. I am all you need to get in to big events but will cost you. I am an important part of travel. And if lost you're not coming.
Turns me on my backs and open up my stomach. You will be the wisest of men though at start a lummox.
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 not very commonly found! Only in some rainforest! I have an odd number of toes! I'm very lazy and hang upside down!
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.