Ok, not entirely sure what you wanted, but I'll try to give you a brief run-down:
In England you've got to be in school until the age of 16. After that, you can leave, or go to college (not the same as college in the US- its usually a 2year course which will be equivalent to most age 16-18 courses) or you can go to 6th form where you take A-levels (which I think are the equivalent of the US SATs). 6th form tends to be the more academic route, while college is often more vocational (although many colleges also offer A-levels).
Then you apply for university (I think this is generally known as college in the US) in your final year (aged 17/18), and your offers of a place to study are conditional on your final results, which you receive in the summer that you leave (age 18).
University courses are usually 3 or 4 years and give you a Bachelors or a Masters respectively. However some more vocational courses (medicine, vet and dentistry are the ones that come to mind) last upto 7 years, but you graduate with a higher level degree (I think this is like the equivalent of the courses in the professional schools in the US, combined with a standard bachelors/masters).
I'm not sure how well that answered your question, but let me know if you've got ant more questions and I'll do my best to answer!