IELTS

Hello Aman,
IELTS is the high stakes English test for study, migration or work.
For more you can go on:
www.ielts.org
The TOEFL test is the most widely respected English language test in the world, recognized by more than 9,000 colleges, universities and agencies in more than 130 countries, including Australia, Canada, the U.K. and the United States. Wherever, you want to study, the TOEFL test can help you get there.
For TOEFL, you can visit:
https://www.ets.org/toefl

You may start preparing it now and strengthen all your basic concepts as now a days mock tests are available on net. That will give you an idea about how much more preparation or coaching is required. Since, scores for GRE are valid up to 5 years and TOEFL 2 years, you can take tests in the final year.

All the universities in Canada accept IELTS score. you don't need to worry about it.
For civil engineering, you can choose any of the following:
McGill University
University of British Columbia
University of Alberta
University of Toronto
University of Windsor
University of Ottawa etc.

Both the countries have a great prospect for mechanical and automobile engineering. Germany is good for Civil Engineering where as Canada is good for Gas & Petroleum engineering, but in Germany, German language proficiency is also important.

For study management course in abroad, work experience is important to get admission in a good institute, but you can opt many institute for MBA in abroad.

You can apply in Singapore, Australia, Germany, France and UAE.

1. Navneet Institute
2. Angel Edunext.
3. British academy, etc.

every institute have its own fee structure ,but it varies from 5000 to 15000.

You class 12th score is little low, but IELTS score is good. You can appear for SAT exam and this will increase your admission chances.
Below mentioned is the list of best universities:
1. University of Melbourne.
2. RMIT University.
3. Monash University.
4. University of Sydney, etc.