Germany

The chances to get admission in German Universities are limited, unless you improve your performance because your current academic performance does not meet requirements of overall good academic records.

Hi friend,
University of Stuttgart, TU Darmstadt, Munich University of Applied Science, FH Aachen, TU Braunswick and Bremen University of Applied Science are some of the best. You may refer to QS World Rankings for more options. Scholarships are quite competitive in Germany though all universities have financial aid. You must have excellent grades to be considered for scholarships.

RWTH Aachen University, Dresden University of Technology, Technical University of Munich, University of Stuttgart are some of the well known universities for aerospace engineering.

Yes, Germany is the best place for mechanical engineers. I will suggest you to increase your percentage, maintain it around 75% and try to score over 6 band in IELTS. Also, if possible, you can learn German language. All the best.

Ruprecht-Karls-Universitt Heidelberg, Technische Universitt Mnchenand Ludwig Maximilian University of Munich, TU Berlin, Braunschweig University of Technology are Germany's top ranked universities for aeronautical engineering.

To pursue MBA, you must gain work experience of a minimum of 2 to 3 years. In addition, you must take the GMAT or GRE and IELTS. Not all MBA programs are free by the way. Visit DAAD website for more details on German education. Here is the URL
https://www.daad.de/deutschland/studienangebote/international-programs/en/?p=l&q=MBA&fos=0&fee[]=0&sortBy=1&page=2&display=list

You are eligible to apply though you will require a higher IELTS band. A 6.5 and above is required for Masters degree applicants. Visit the university websites for specific requirements though. If an university requires a 6.5 they will not consider anything below 6 considering the stringent admission procedures. If you are aiming for the TU universities consider taking the GRE. Visit the daad website for university specific information.

You need to get admission in a university, not college. Check out the link mentioned below:
https://www.daad.de/deutschland/studienangebote/international-programs/en/?p=l&q=mechanical°ree[]=2&fos=0&fee[]=0&sortBy=1&page=1&display=list

All the three are good. What is your budget?
If they offer Ph.D that shows they have tie up with industry.