Akichi Daikashima said:
I'd like to get into Uni, and (preferrably) do Philosophy, Psychology and Linguistics(it doesn't require an A level in Philosophy, there's just a "logical reasoning" entrance test, requirements, A*AA), if my predicted grades won't be all that great, then I will do English Literature and Language(requirements AAA).
I know you're aiming for Oxford, and I'm going to roll my reply to your message into this post in case anyone else finds it useful.
Above all else: if (as your post implies) you're planning on changing the course you apply for just because you're worried you might not get the grades for Oxford for your preferred one... DO. NOT. DO. IT. Seriously. I did, and it was the single biggest mistake of my life. Oxford is nice, but it's not worth giving up the course you really want to study. The workload is insane, much more so than at other universities that are, frankly, just as good like UCL (where my sister is doing a very similar course to me, so yes I do have grounds to make that comparison). At other universities you'll have a few essays a term. At Oxford you will have one or two every week, and the reading lists will be just as long as elsewhere. Terms are ludicrously short, so weekends don't exist here, and it's normal to work late into the night most days (in Finals year, most of my friends are consistently working until 10-11pm). And the pressure is immense - it truly is a hothouse. Honestly, if you don't love your course and are not fully committed to it, you are not going to have a good time and will probably become bitter and resentful. I speak from experience. Add to all that the fact that the institution is woefully stuck in the past (the mental health policies at some colleges are literally Victorian), and the attrition rate is high, despite what the heavily doctored drop-out statistics may tell you.
I'm not trying to scare you off exactly, but I do feel very strongly that applicants deserve a more honest portrayal than they normally get. There are good points, I've had some great experiences as well as the bad, and some people do take to it like a duck to water, but a lot don't. Other institutions are rapidly catching up (if not surpassing us in some areas) in terms of academic excellence, and they're doing it without being as punishing as Oxford. Above all though, ALWAYS put the course before the institution. Oxbridge is not the be all and end all. I know it can seem that way when you're applying, but honestly, if I'd known then what I know now I would have stuck to my guns and done the course I really wanted to do somewhere else.
(To answer your question about grades, I got A*A*AA, and unless you're from a very underprivileged background you really do need to meet the entry requirements for the course you're applying for.)