UK

For that you have to give GMAT. And, apply for the colleges and universities you wish to go through GMAT.

You can do any one of the following courses:
M.Sc Accounting and Finance
M.Sc Financial Accounting
M.Sc Finance and Banking
M.Sc Corporate Finance
M.Sc Forensic Accounting
M.Sc International Finance
M.Sc Banking and Finance
M.Sc Financial Services
M.Sc International Banking.

United Kingdom and Canada provides a good arena in MA in Psychology and same in US. Infact, state universities of US are more financially stable option than UK.

Scholarships for study abroad are mostly merit basis, if you want scholarship you must have an excellent profile, excellent grades, extracurricular activities etc. The university will evaluate your profile and decide your scholarship decision. The more highly ranked the university is, the more competitive it will be. You can also check Shiksha study abroad website for scholarship.

Hi, GRE is not mandatory to study in UK. If you are taking GRE for US, a score of 315 or above is recommended.

Yes, surely you can do so. You can apply for the universities in you have related course. You can also enquire about it from the university you want to apply in. Open it's official site and extract the contact email and write to them. All the best.