IELTS

It is low score for most universities. Try to take another test and score 6.5 n above. If you can not do so then you should apply for low ranked universities

Hi Gurjot, check the official websites https://ielts.org/ and https://www.ieltsidpindia.com/ for details.

Hello, this will depend on the language of instruction of the program. So you need to check whether the program would be English taught or German taught. If it is an English taught program you must take IELTS irrespective of a German level score. In case it is a German taught course there is no IELTS requirement. Would still suggest you check university and DAAD website for details.

Dear Risabh,
SAT is the standardized aptitude test for admissions in the universities of USA and Canada mostly. It mostly includes high school level mathematics, english and reasoning skills. TOEFL and IELTS are tests for proficiency in English language. You need to take either one of TOEFL or IELTS when you apply abroad. Every university has its own score requirements which you will find on the respective websites, For more details you must check the official websites.
https://collegereadiness.collegeboard.org/
http://www.ets.org/toefl
https://www.britishcouncil.in/exam/ielts
Regards

Hi, some of the popular books for IELTS preparation include
The Official Cambridge Guide to IELTS
Cambridge IELTS 10 Self-Study Pack
Barron's Essential Words for the IELTS
Cambridge IELTS 11
There is no such best book as what is best for me might not be best for you. These are generally the most followed books by test takers.

Please explain or elaborate your query. These are standard tests for admissions abroad, for details you must check their official websites.

Hi , the budget is too low particularly for US. You may find few options in Canada. Please go through the options below
https://studyabroad.shiksha.com/ms-in-mechanical-engineering-from-abroad-ds11509265?country=usa-canada

Hi Jayesh,
You can find a list of coaching centers here-
https://testprep.shiksha.com/ielts-exams-coaching-classes-in-ahmedabad-categorypage-14-51-930-0-0-30-109-2-0-none-1-0
https://testprep.shiksha.com/gmat-exams-coaching-classes-in-ahmedabad-categorypage-14-51-928-0-0-30-109-2-0-none-1-0#cateSearchBlock
Hope it helped.

Download some material from dbp IELTS website

Since you have not mentioned the country, choose from the following list.
http://www.masterstudies.com/Masters-Degree/Biotechnology/