IELTS

September intake is not possible now so please start preparing for January intake and visa procedure takes almost one month, so plan accordingly.

Yes, you do. Here are the requirements:
https://www.qut.edu.au/study/international-courses/master-of-project-management

Your academic performance is not that strong and GRE and IELTS score wouldn't help you to get admission in good college in USA. If you want to take admission in an average college from USA then Indian colleges are better.

Most students don't find IELTS or TOEFL difficult. It's only a test of your English reading, writing, listening and speaking skills. How difficult can it be? However you must take some practice tests to acquaint yourself with the test pattern etc. If you are not feeling confident, the go ahead and join some class for a month.

Hi,
It's difficult to locate a particular college which may give you an admission only on IELTS score and overlooking your academics, work experience and GMAT scores. I will, therefore, suggest you to check this list for appropriate options:
https://studyabroad.shiksha.com/mba-in-abroad-dc11508

Hi , University of Windsor, Carleton University, University of Calgary are some of the finest universities for this branch. Check here for more good options
https://studyabroad.shiksha.com/canada/ms-in-mechanical-engineering-colleges-ds

Hi,
It's a low score for Master's. Consider a retake or check with the universities for pathway programs in English.

Hi,
This will depend on where you want to apply. Different universities and countries would have different requirements. Other than IELTS you must also have passed class 12th with good grades.