Education in UK : suggestions if possible .

Hello everybody , I am italian and I would like sooner or later to come to UK to study .
The question is a little complicated , because first I would like to visit Australia and Canada and to go back for my third time to USA , to evaluate if I could find a good university where to enroll ( since the idea of living some years outside Europe stimulates me a little ) , and then I could come to UK , settle down for a while and begin my studies .

First of all of course I need to improve my english , then I need to improve my skills because I am a little aged ( born in 1972 ) and did not study so much math at school , then I would like to enroll at some faculty of architecture ( if possible , after this or even at the same time , urban sciences and civil engineering , too , anyway not interior design or things of that kind ) .

Another thing I would like to study is theology and compared religions ; I am a christian but interested in any kind of spirituality and religious culture : the three monothestic religions , buddhism , induhism , etc … If my life will be long enough :cheers1: , I want to do both archi and religions .

So , my questions would be : how to enroll in a british university , for archi and scientific faculties in general ? Are there some kinds of official courses to prepare who may not be able to pass an eventual test of admittance ? Are there tests of admittance everytime ? No free entrance ? How do they prepare students with computer science , computer graphic and things of this kind ?
What about humanistic social and religious studies ? Are there applications in those cases , too ? Do you know why I can ‘ t find anymore on line a complete faculty of theo and compared religions in London ? I though there ought to be at least one ! If not , where in UK ? Oxford ?

Have you got any idea about the fees for these kind of universitarian studies ?

Ok , that ‘s should be all for the moment : thank you if you can answer me ( you can send me private messages , if you prefer ) if not , no matter and happy 2010 to everybody !