Chartered Accountant questions...?

I am thinking of doing an apprenticeship when I leave sixth form with maybe Deloitte, depending on if I get it. I know this will be a fast track to accountancy and getting that ICAEW (is it really the equivalent of a Masters degree?). Anyway, I was wondering how much money you could earn if you reached the top of your profession in, say, tax or audit at a top firm such as Deloitte (I've tried to search up but it's just for America or India from what I can see) and what jobs an ICAEW qualification can lead to, for example, can you do a conversion course in law if you have this qualification as opposed to having a degree, and will law firms accept you and sponsor you through the GLC if you can do convert from an ICAEW? Finally, how old will you be once you finally qualify for the ICAEW if you do the apprenticeship from leaving sixth form with Deloitte as an example? Thanks.