you're probably going to have to be a bit more specific.
What's your immigration situation (ie, are you british citizens, do you qualify for any visas, etc)?
Where in the UK are you thinking of moving to? Different areas have very different cost of living.
If you give a more detailed picture of your circumstances it's more likely that the members here will be able to help. But if you just want the most general information (ie on building credit etc) do a search on the forum as all of these topics have been covered here over the years, often in multiple threads.