Canada

You may go for:
Post-graduate
Diplomas
Masters Programs
Doctorate Courses
Post-graduation courses in Canada offer a number of fields for students.

Dear Ishan,
Poland is not a bad choice but Canada is one of the most popular and best. If you have a strong profile I will suggest Canada. You may further zero in based on your budget, climatic conditions and University admission requirements.

Dear Vishant,
Apparently, every university requires either IELTS or TOEFL. Universities will prefer either IELTS or TOEFL scores, certain universities in US do not accept IELTS but TOEFL. Its difficult to specify a name from among thousands of universities, you must research properly, visit their websites and communicate with them. It's rare that you will find any university not accepting these scores. They might waive-off if your profile is strong.

You should go for B.Com as it has many good options as compared to BBA.

Yes, prepare for IELTS and GMAT and then check out the top ranking universities.

Just Google or check out the topmost ranking universities in Canada including University of Toronto and others.

You should check out University of Ontario Institute of Technology.

German universities are the best universities for MS in Mechanical Engineering. All the major engineering firms are in Germany. Education fee in Germany is very nominal and German government allows PG students to work 20 hours per week along with studies. You are advised to prefer German universities over Canadian universities for MS in Mechanical Engineering.

Hi Kishan, you can apply if you meet admission requirements. It will be difficult to gain admission in a university but you can check colleges like Humber, Seneca, George Brown, Fleming, etc. You can also apply under SPP programme. Take your IELTS too. Check college websites for admission requirements and apply.

Hi Sangita,
You must apply for a student visa but only after when you have an admission offer from an university in Canada. Your spouse can apply for the spouse visa, details of which can be found on the immigration website.