University costs/accommodation help! (UK)?

I'm going to university next year and it would be great if someone could explain to me loans and fees and stuff because i've been searching non stop and I still don't understand it?

1) My course will be £9,000 a year for 4 years, will I have to pay that back straight away? If not, when do I have to start paying it back?

2) Accommodation will be around £100 a week for the 3 years (1st year is free apparently), do I need to pay that straight away? Or can I get a student loan to pay it for me? If so, when do I start paying the student loan back?

3) If I do get a student loan and assuming I can use it to pay for my rent, will I need to get a part time job for food/living etc? Or can I get a separate loan for that?

I'm just wondering because my family isn't wealthy at all and i'd love to go to universities like Leeds or Warwick or Bristol/Sussex or even Imperial college of London, but my dad is saying it will cost too much money. Will my family have to pay any money for my university life apart from food etc if I don't get a part time job? Can't I just pay the debt (assuming I don't have to already pay straight away, see top questions!) when I get a job?

Thank you for your time!