You could:-
-put an advert in your local music shop
-ask your local exam rep to recommend you to anyone looking for an accompanist
-advertise on the website musicteachers.co.uk - it doesn't cost anything to include your name
-let your local instrumental teachers know that you're available to accompany their pupils for exams
-see if any of the local choral societies need a rehearsal accompanist
-advertise your services in the local newspaper.
As to how much to charge, there have been many threads on this subject, and the answer as far as I can see is How long is a piece of string?

The website of the Incorporated society of Musicians gives some idea of what people charge for accompanying, so you could start there. However, rates vary in different parts of the country, and some people charge nothing for accompanying, while others charge quite a lot. It might be an idea to sound out what other people are charging before you settle on anything.
Good luck - you are right in assuming that it won't be enough to earn a living, at least not at first and not unless you are totally brilliant and everyone wants you to play for them. I think the majority of people teach as well, so when you are settled in your new area you could look for pupils. In the interim, what about playing in restaurants - that's the only one I can think of right now, other people will have better ideas.