1. Yes, you absolutely have to be a native English speaker for the government driven EPIK programme. It's also the same for virtually all private academies these days. Nothing else matters. 2. As a student, you will only be able to find part time jobs which don't pay much (less than $5/hour) 3. You absolutely need TOPIK5 for studying in Korea if you apply directly which isn't easy at all. It would be easier and less of a financial burden if applied as an exchange student instead. Go to your local university first then look for your opportunities.

You should send a e-mail at first .and then you could be able to phone them directly in appropriate time. I have a friend who did like that, of course ,that depends on your language level.