Answer:
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.
What type of dress can never be worn?
You will always find me in the past. I can be created in the present, but the future can never taint me. What am I?
What runs but never walks has a mouth but never talks has a head but never weeps has a bed but never sleeps?
I am a shower that lights up the sky
Give it food and it will live, give it water and it will die.