After you marry, you'll have to apply for "further leave to remain", which allows work etc.
After she's been in the UK for several years - and passed "life in the UK" and an English language exam - then she can apply for "indefinite leave to remain"
The precise timings have changed since we did it.
It'll be expensive (even doing it yourselves)
Her "leave to remain" is in the form of a residency card (along the lines of an American "green card") and serves as visa for entering the UK
When applying for each stage, you can print the forms and paperwork requirements from the gov.uk website.