1.8000-8500 birr it differ from school to school 2. It mandatory but if your not a citizen I'm sure they will have some other rule. can use ur passport I think 3. After registration In my experience it's based on your schedule 4. it's based on the school if there are many students you should have to wait like it might be 1 month 5. What is the name of the place your living right now so that I can tell u the nearest 6. most of them speaks amharic but I'm sure there are schools that fulfills your needs