Pay - Not great, depending on where you go expect around £150 a week.
You don't need your IR to instruct. In fact some schools would prefer it if you didn't because they know that you're not about to rush off on an airline job.
Once you've got your FI (restricted) rating you shouldn't find it amazingly hard to get work. If you're prepared to travel and are looking around summertime you should be alright.
Hope that helps.