Would really appreciate some advice

I am currently 18 and living with him half the week and at home half. I am working full time as a secretary and earning £13k
1. Is he allowed to apply for a work permit of any sort?
2. Can we get married in the uk?
3. Do i have to be living on my own for a sucsessful application?
4. and how much money do i need to be earning?
Any advice would be appreciated thanks