IELTS

No you have a 13 year gap which is not acceptable in IELTS.

Yes, definitely you can do MS in CS from abroad.

RMIT University, Deakin University, University of Canberra, Monash University, etc.

Yes, you can apply for some US universities and colleges but not the top tier colleges as you require a minimum of 7. For more information please visit https://www.shiksha.com/articles/all-about-ielts-blogId-5697.

If you are planning to do your MBA from abroad like Canada or north America then you have to give IELTS as the top universities require that.

Getting admission depends on many factors like parents' income,10th marks, academic letter of reference with what you have mentioned above if you have the following you can get admission.

Hi, you can apply for Canada but chances for getting visa will be very less for that you need to do IELTS again so you can get more bands to get visa.

Hii, Yes. Though English language proficiency is one of the requirements, there is an alternative if you choose to study at a university that waives IELTS. Instead of submitting your IELTS scores, you need to submit a document from the university stating that you are eligible to apply for a Visa. IELTS is not necessary to get a UK study visa. Most of the time, the British High Commission allows students with Confirmation of Acceptance for Studies (CAS) issued by a UK institution in which the student has applied. Thanks.

I would suggest you to give it again because Canada always asks for more than 6 as a band which would make it equivalent to 7 based on CLB (Canadian Language Benchmark). So better give it again and try to get more than 6.5 in each section.