Canada

Yes, Canada has many good colleges teaching Mechanical Engineering. Whether you choose to do MSc, MEng or MS, the list of colleges specialzing in this field is as below.
University of Alberta,
University of Victoria,
University of Manitoba,
Memorial University of Newfoundland,
University of Ontario Institute of Technology,
University of Saskatchewan,
University of Ottawa,
University of Windsor,
University of Calgary,
McGill University,
University of British Columbia.

Yes, co-curricular activities always help. Try volunteering at some NGO as well to show social work on your CV. And improving CGPA is very important, so focus in that as well. You will also be required to appear for IELTS, so aim at scoring at least 7 bands overall so that your admission process is smooth.

Hi,
Please mention the course you are interested in studying. Shortlisting colleges will depend a lot on the subject you choose.

Hello,
Start researching on the universities. You can check QS world ranking to know about the top or best universities in these countries. Visit their websites and check the individual university admission requirements. You must take GRE and TOEFL or IELTS and to get into the top competitive universities you must score high. At this moment start your research.

Go for SRM or MIT which transfers student for their interest based programs in foreign

Hi, both Australia and Canada are good options for studying , Canada is more competitive. Germany will be competitive basis your CGPA but you can still try.