Welcome to the forum.
Im afraid I don't have much time at the moment to go into depth..but will answer briefly for you and hopefully everyone else will elaborate!
To register, you need to contact your local childrens information service (or equivalent if not in England). They will invite you to a briefing where they will take you through the registration process in detail. Its a fairly complex process and takes a few months.
Wages, depending on where you are you will get between £2.50 and £6 per hour per child. Im in London so charge £6 but I know its a lot lower elsewhere.
You need firstly to do some market research into the local demand for childminders. Some areas are deperate for more and in some areas you can't fill your spaces. If you ask the council for a list of local minders (pretend you are a potential parent) then call a few and ask if they have vacancies and how much they charge so you can get a better idea.
As long as your house is suitable and clean, you (or hubby) don't have any horrendous past convictions, You aren't ill and you don't have huge growling dogs or a river in your garden you shouldn't come across any problems regsitering.
Childminding is the best job in the world its days and days of fun, you gain a huge family, take an active part in the local community and make loads of new friends. Don't get me wrong it is VERY hard work and Ofsted do all they can to drive you to distraction but its all worth it.
Good luck with the registration. Hope you keep on here as its a great forum for support
LS