Answer:
I am a little piece of paper, yet sometimes hold lots of value. I am all you need to get into big events, but will cost you. I am an important part of travel. And if lost, you're not coming. What am I?
What has to be broken before you can use it?
I wear a green jacket on the outside white jacket as a second layer and red jacket inside. I am pregnant with a lot of babies. (one word)
I am a vegetable that bugs stay away from
I fill a room but take no space.
A little house full of meat, no door to go in and eat.