Noob

Hi, i am new at this and learning and I have a few questions
I would like to know about with my iPhone 5C 7.0.4 version.

Any Cydia for that version yet ?

How safe is Cydia on my device ?

If I ever download Cydia and Download like 5 apps and then
remove Cydia from my device, will all apps I downloaded with Cydia be removed too ?

Sorry for so many questions, like I said before, I want to learn.