Hello Phila,
Your questions are fairly general, but I understand it is difficult to understand the British system coming from Italy (that kind of reminds me of me 3 years ago :)). Anyway, each university will have its own requirement for the English language. It is likely that you will have to prepare for the TOEFL examination, and depending on the institution, you may be asked to pass it with a certain score.
About the funding, and this is the difficult bit, you will have to identify a university which has an open position which provides funding for an EU student (try consulting the website jobs.ac.uk for a start), after you identify a position you like, you will have to apply (and compete) for it. If you are a suitable candidate and there are no competitors with better curriculum, you will be selected.
This is fairly similar to hunting for a job, you have to identify where the funded positions are, and apply for them if they suit you.
Feel free to PM me (in Italian :D) if you like.