Germany

First, decide your university and then go to its website for the requirements. You can also get the requirements in DAAD database or Anabin database.

Kindly visit this link:
http://www.degreefromgermany.com/blog/universities-for-automotive-engineering-in-germany/

Well, you will need to check if your credentials are valid in Australia or not.

Here is some information that can help you:
https://erproof.com/sap-certification-cost/

Here is a link that can help you:
https://www.apnaahangout.com/be-btech-agriculture-engineering/

I would say, yes, it is a good choice to pursue MBA in Germany because, considering the economic condition of Europe, Germany is better than other parts and definitely it's a great choice as Germany is one among the top developed countries. Here are some top reasons to plan your MBA in Germany:
1. Top MBA schools
2. Exposure to German Corporate world
3. Great Placement opportunity
4. Quality Education at an affordable price.

TU or Technology Universities are more into research, the studies and courses they provided are research oriented and provides a very theoretical knowledge on the subjects. FH or University of Applied Sciences has name suggests gives more practical knowledge or industry oriented studies, makes you job ready.

Hi,
Yes, it's called Studienkolleg. You have to be accepted by the university even to pursue the Studienkolleg programme so it's not easy and definitely not a waste. If your grades are way below their requirements they may not even accept you.

Hi,
I am sure you will, those grades are good. However, admissions will also depend on your SOP and LOR. You may take the SAT just confirm with the university if they accept SAT and check if they have spring intake or not. The sooner you apply the better.