TOEFL

Hi
The best way is to check a mock test available online and attempt it as different people have different abilities. Also, it depends on your instructional language to know your proficiency levels.

You need to appear only in GRE and IELTS for the same.

TOEFL (Test of English as a Foreign Language) and IELTS (International English Language Testing System) are two of the most widely-accepted tests to certify your English proficiency.
TOEFL follow mostly North American English accents and IELTS follow a range of international English accents. The length of TOEFL is 4 hours and that of TOEFL is 2 hrs and 45 minutes.
Fees:
IELTS : In India, the fee is Rs.11300
TOEFL : more than 200$ and not more than 400$
If you don't want to spend a lot of money and if you are not a native speaker then go for IELTS It is less complicated.
Best of luck!

Hi Ankit,
You can check the below mentioned link:
https://testprep.shiksha.com/study-abroad-classes-in-ahmedabad-categorypage-14-51-1-0-0-30-109-2-0-none-1-0

As for reporting, the scores will be reported to the selected university everytime you take the test. However, the best score from both the attempts will be considered by the universities. It is very much similar to the concept of betterment exams in India.

Hi Damana,
Since you know its late you should be searching for universities having deadlines and prepare your application without more delay. You may find options till Nov or Dec.

Australia is indeed a very good option to pursue Masters. Also, job opportunities are great in Australia.

Yes, you can. You need to score 65 percent marks in engineering.

Both have different formats of studying. For CAT, you need to focus on data interpretation, logical reasoning and verbal aptitude with as much as mock exams you can give.
For TOEFL, you need to focus and practice your speaking and hearing skills and need to be well versed with words and synonyms.

IELTS is conducted by British Council so most of the German universities prefer IELTS.