Good day Lyrical,
In regards to your previous post. You can trust me in saying that you will be glad that your sixth form is pressuring you into looking at universities now. My college did the same and I am so thankful as I was able to go to all the open days the universities host over the summer which are massively important for you choosing which unis to apply to. If you didn't worry about it until you start Year 13 you'd probably miss a lot of open days for a lot of unis.
Now, on to your questions.
1) I would say Surrey was a clean place. As clean as any other private establishments or universities. How it works at Surrey regarding campus accommodation is you can choose between Band A to Band F. Band D to Band F are en-suite rooms. Band C and below are shared bathrooms. Band C is by far the most popular non-en-suite. All Band C rooms (but one) will have wash basins in the room. So personal grooming and the like you can do in your room which is up to you to clean so you can have it as spotless as you like.
All shared areas will be cleaned by professional cleaners. So this will be the kitchen and hall ways for all courts, and the shared bathrooms and shower rooms for Band A to Band C rooms. They come every other weekday. So if the place is clean enough for you I can't say. However since people have wash basins in their own rooms the shower rooms are just going to be used for quick showers and there will always be a few shower rooms you can choose from.
2) Surrey has a fair amount of help financially for students. Help and advice for how to manage your money you can pop in all year and ask. In regards to actual scholarships and bursaries be sure to check out their site to see what you could be entitled to. They do change the schemes occasionally but you can always find the latest schemes here
http://www.surrey.ac.uk/discover/tuition-fees-bursaries-scholarshipsMost of the stuff on that page will be free money for you which you won't have to pay back. They're not loans. So check thoroughly to see what you are eligible for.
If you're still having trouble making ends meet you can go see the help and advice people and they may offer you financial help from the hardship fund which will usually be a small interest free loan to help to get to your next loan payment. But only if they think you both need it and deserve it.
If you think you wouldn't be entitled to any of the bursaries on the above link, or you don't think they will be enough then there's always the option of getting a part time job during your studies which a very large number of people do, including myself. The best way is always to work for either the university itself or the students union. They will understand you're a student and may need time off occasionally for coursework or exams. Guildford town centre also has a lot of shops which you can work at too and is very close by.
3) Universities won't make go to lectures on the weekends and they don't have half terms. University is very different to school, even boarding schools which are the only schools I know where you have to go in over the weekend, and they definitely won't ever make you go home at any point. Once you get you uni you will be 18 years old and independent. You can do whatever you wish. You can even stay at uni over Christmas if you wanted to. Many international students do. You don't even have to go to the lectures if you don't want to. Although I don't recommend it.
Occasionally you may hear things called reading weeks which some courses have. Don't fool yourself into thinking this is a half term. It's just a week where you won't have any lectures scheduled because your department will expect you to catch up on the reading and coursework you've been given over the semester. Revision classes usually occur over this week anyway.
4) The cheapest accommodation will be Band A. Which can either be shared rooms on campus, or very small rooms on this very small court very far away from campus called Hazel Farm. The next cheapest will be Band B (I bet you can see the pattern here), which are small outdated rooms on campus, or decent sized rooms in Hazel Farms. The next cheapest will be the last non-ensuite band which is Band C which is the most popular non-ensuite band and are all decent sized rooms on campus. You can find all the info about the courts and their prices here
http://www.surrey.ac.uk/accommodation/index.htmI hope that has helped. Please feel free to ask about anything else if it comes to you. My best advice to you now would be go to any university fairs that are near you. You sixth form should offer you take you to one some point before summer. Grab all the prospectuses of the unis that interest you, and if some aren't there, you can order their prospectus online for free. Then literally go to every single open day you can find over the summer for the universities you're interested in, even some you may not. Nothing will give you a better idea of what university life is like. Eventually you know exactly what unis you want to apply to through UCAS.