IELTS Scores

In order to study in Canada and Australia, you need to score a total of 6.5 band in IELTS with no band less than 6. So, you should retake the exam and score well.

Hi,
Scholarships are generally based on your academic performance and co curricular activities. IELTS is basically taken for East visa process but if you score 100%, chances of scholarships will become better.

Your Diploma cannot get you admission in abroad universities, so try to complete your B.Tech, then try for abroad studies.
All the best.

Hi,
Some of the popular books for IELTS preparation include:
The Official Cambridge Guide to IELTS
Cambridge IELTS 10 Self-Study Pack
Barrons 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.

If you apply in USA universities, then you have to appear for GRE with TOEFL. For other countries, you don't need to appear for GRE, only TOEFL or IELTS is enough. But if, your academic record is not up to the mark, your GRE marks help you to get admission there.
For MBA admission you need to appear for GMAT with TOEFL or IELTS as GMAT is must for MBA in abroad.
All the best.

Hi Dilpreet,
6.5 is considered good enough by most universities and programs. Many universities require a minimum of 7. Check the score explanation below to have a better understanding
http://takeielts.britishcouncil.org/find-out-about-results/understand-your-ielts-scores

Yes, your IELTS score is good. You can get the student visa of Canada.
All the best

You can only get admission in a Canadian university to pursue MS after you clear your backlogs.

No, IELTS score is only valid for two years. You need to take the test again after two years.

If you score well in IELTS and GRE , you have chances, but it's tough to get admission ,most of the applicants have good marks ,they need 75% mainly ,try to search more safer universities in Canada, like Newfoundland, York, Victoria, Laval, etc.