IELTS

Yes, you are eligible to Study abroad. A band score of 7 isn't bad.

No, Some University can ask you to take their own test but, it is best to go through GRE and IELTS to get the best colleges.

Hi Patel Dhruvil,
Maximum Universities in UK requires 7 or more for Masters Studies. Both IDP and British Council are equally popular, cannot provide any comparison. If you want to study in UK, British Council is recommended. IDP is preferred for Australia etc. But, this is a general belief. Both are equally accepted as mentioned. You may check student reviews on the net.

No, you cannot apply without IELTS because in Canada most of the universities require 1st IELTS score.

It would be better if you go for MS in Canada rather than PGD.

If you want to go to Canada then you have to increase your IELTS from your current score to 7 overall. It is the same for other countries also.
If you want to go for work then you are required to score 6.5 overall.

Normally, Universities requires 6.5 band and minimum 6 in each module. If you are looking for admission for 6 band and each module not less than 5.5, then you can look into colleges. You can see Sheridan College.

Yes, you can easily go to Canada for job, you can find relevant exam details on shiksha.com website and apply for same.

Hi,
MBA eligibility in the universities you mentioned is a good Bachelor's degree, 2-3 years of solid work experience and a very good GMAT score plus strong LOR, essays etc. NUS and NTU are extremely competitive, 570 GMAT seems quite low for admission in these universities. Average recommended GMAT is 680+. Besides these universities you will find a few foreign university campuses and private colleges offering MBAs from foreign universities which you can look up.