At 14 I didn't have a bedtime but this was mostly because my parents were crap at ever getting me to stick to my bedtime [I always had trouble with getting to sleep at night so I resented the idea of having to go to bed and be bored for a couple of hours, so I would just stay quiet and they'd forget about me]. I put myself to bed when I got tired. I think a good idea would be to arm yourself with a bit of knowledge about how many hours' sleep average 14 year olds need, ask herself first how long she thinks she needs, then mention the research and work those two together to get an acceptable bedtime.
I have never, ever had a curfew because...it just wasn't necessary? If I was staying out later than about seven it tended to be at a gig so my dad or someone else's parents were picking me up anyway. Same with at friends houses - I never really 'hung around' as a teenager [did more of that in primary school really] but I suppose you might want a curfew if she tends to do that.
She might see £5 as hardly anything [I would have, I got £10 at that age] but it is probably just about enough, unless she has expensive hobbies [gigs used to be my major spend and they cleaned me out]. Is there a possibility of her doing standard jobs for the £5 every week and then occasionally doing something extra for a further bit of money when she needs it?
I think splitting up washing is a bit pointless to be honest [to get a full washload with one person you'd have to wait a few days, and she may well want to wear certain clothes more often than that, if you see what I mean] but she could do one of the family loads a couple times a week. I didn't do much - set the table, made my own packed lunch - but would have actually been happier to do more regularly. I was more annoyed when I suddenly got asked to do something and then my mum would get annoyed if I didn't do it RIGHT AWAY, like I was meant to have known that she wanted me to do it and therefore not have been doing anything important myself. Someone else's idea of asking her what she thinks is acceptable and you might be surprised is a good idea.
If you are prepared to pay £3 a day lunch money [or whatever you find out is actually necessary for a decent lunch at her school, and agree with bringing her own drink in] then I would just say firmly that nagging will not get it raised and if she doesn't like it she can have sandwiches instead. Most secondary canteens IME tend not to bother regulating where people sit, so even if all her friends buy lunch she should be able to sit with them and she can still queue with them if she wants.
If I had had the internet in my room at 14 I would have been on it all night long. I did have my own computer but with no internet, so although I did a bit of late night fiction writing, it was nowhere near as tempting as the world wide web. But if she does have her own laptop/phone then I would start with agreeing with her a time when they have to be off by - i.e. bedtime - and then trusting her at first to stick to that and turn them off herself. If you subsequently find out she's been abusing that trust and you can hear her late at night or see browsing in her history or whatever, then you'd have to remove them yourself for a while and say to her she can have them back for a trial period again later to see if she has now learnt to control her impulses. She won't like the implication that she can't be trusted, even if it's true, so hopefully if she does break trust the first time will get it the second time.
TV is a tricky one - I use mine to get to sleep too. Depends I think - ask her if she uses it to get to sleep and if not have that go off at certain time too. If she does, go with the request that whatever she puts on is not too stimulating - i.e. something dull like News 24, or a DVD she's seen hundreds of times, so it is background noise but she won't be tempted to stay awake to watch it. Again, if you find she's up till one am every night watching movies or whatever, take it away [she'll have to learn to sleep without it or be very tired for a week].