are you able to work at 14

I dont think you can. I'm pretty sure it's 16.

Yes, you are. You will need to contact your school to apply for a work permit. The state of Iowa will allow 14 and 15 year olds to work, but a work permit is required and you can work until 7pm on the week days.

I'm not sure, you can call the store & they will know more about the minimum age to work at their store.