I want to go abroad for higher education. How to apply to any foreign university?

I want to go abroad for higher education. How to apply to any foreign university? Hello friends,
I want to go abroad for higher education. I want to get admission to a university of any English speaking country such as Canada, Australia, UK and US.
I want to pursue master degree from any recognized university.
What are the exams i have to face to get an admission to university and what are the procedure to apply to any foreign university?When to apply to those universities?
I don't know much about these things , so tell me clearly so that i can understand.

I have another question.My stream is electronics.I am a graduate student.Can I study any other subjects in master degree?