there are so many different posts about this question. check out this thread though:
http://www.pprune.org/forums/showthr...hreadid=119608
Cost varys so much, from about £40,000 up to £70,000 depending on where you do it and whether its integrated or modular!
Dont know what the qualifications are. Couple of GCSEs i think and fluency in english.
As for the medical, its a tough day but if your fairly fit and have good hearing and correctable vision you should be fine. Just as long as you dont have epilepsy or something like that.
Get the book: "guide to becoming a professional pilot" by Clive Hughes. Its excellent and will answer most of your questions about everything involved in becoming a pilot!
Best of luck!
Steve