Exam

You need to score more than 95 percentile in CAT exam. Since your graduation percentage is low, a high CAT score will help you.

Yeah, you will get some relaxation as you belong to the reserved category.

For visa, your marks are not considered. Your motive of visit and aim plays the important role.

Start now by solving 5 - 10 quants every day and read newspapers every day to make your vocabulary strong.
When you get into the 3rd year, start your full-fledged preparation by joining classes or solving mock tests.

Yes, you can get admission.

You should prepare for CAT exam. If you prepare for CAT, you can easily qualify MAT as CaT is tougher than MAT.

Can I know in which government you want to get admission?
Top Paramedical Colleges in India are:-
1. AIIMS, New Delhi
2. Christian Medical College, Vellore
3. Armed Forces Medical College, Pune
5. Kasturba Medical College, Mangalore
6. Maulana Azad Medical College, New Delhi

IELTS or English language proficiency test is required in the UK. You must write to the universities if you are planning not to take any test. It is very rare that they accept candidates without an IELTS score. Visa rejection chances are also going to be high.

HI
I would like to address this under two separate issues/process
Admission - There are few schools in the US which are not ranked, but may accept students without SAT.
Visa - There are hundreds of students applying for the student visa for higher education in the US. Most of them have taken the SAT, a