Answer:
When I am caught, I am thrown away. When I escape, you itch all day. What am I?
What has keys but no locks a space but no room and you can enter but can't go in?
I am a vegetable that bugs stay away from
I turn around once. What is out will not get in. I turn around again. What is in will not get out.
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.
I walk on 4 legs in the morning 2 legs at noon and 3 legs at night.