Degree

You can do PG in mechanical engineering from these colleges;
Durham College
George Brown College
Sheridan College
Algonquin College
Humber College
Seneca College
Centennial College of Applied Arts and Technology
Confederation College of Applied Arts and Technology.

You should show B.Com in your graduation degree as that is a mandatory field.

Hello sir / ma'am
I am pleased to have connected with you.
Kindly visit this link for information related to your query.
https://www.shiksha.com/college/allahabad-degree-college-51815/courses/bcom-bc

No it's not possible. You should not do this
because mechanical engineering is all about practicals, hand practicing on machines.

https://www.shiksha.com/college/jai-hind-college-churchgate-Mumbai-1199
You will find all the true and authentic information about your college here.

Aurora's Degree College, Hyderabad, was instituted in 1989 by Aurora Consortium. The institute has five departments offering various undergraduate and postgraduate courses. Aurora's Degree and PG College Fee Structure and List of Courses Summary. CourseDurationFees
B.Sc [Bachelor of Science]3 Years33,270.

Equivalent to a Bachelors degree in business management only.

The fees for B.com is around INR 20000 to 35000.

If you have claimed your migration from the University then you will not be able to complete the degree but if the migration is still there in the university then you can try once to visit the university and request them to enroll you for further years.