IELTS

Hi Nikhil,
I would suggest you to start your preparation from the 2nd year, but you should write it in either 3rd or 4th year because GATE and other exams cover the course of mainly 2nd and 3rd year.
If you are applying for fall, you should take latest by July or even before that, so that after writing it once you can think about a second chance, if not happy with your score, otherwise you start building up your SOP and search for the right place to go.
All the best.

It depends on the level of university and the course, which you choose. There is no age limit to pursue a course, but it is definitely a criteria for embassy while deciding to give you visa or not. For Master's course, the maximum age as per my experience is 35 and for Bachelor's, it's 24. Beyond this, you should apply for Ph.D. IELTS is not a country requirement as it's not an English speaking country, but certain universities will ask for 5.5 to 6.5 band for courses taught in English.

Which course and university have you applied to?

You have to score at least 6.5 overall with not less than 6 in any module, but try to get more to make your profile good.

Hi Aysha,
There are four sections in GMAT exam:
1. Writing Ability
2. Integrated Reasoning Skills
3. Quantitative Skills
4. Verbal Skills

SPP requirements are 6 bands, not less than 5.5 each for UG program.

Hi Swagata,
Chances could be good if the university do not require a GRE score. Your IELTS score is also a little low as most MS programmes require an overall score of 6.5. Kindly, visit university websites for admission requirements. Admission chances will depend on your profile and will be decided by the university solely.

Hi Jinal,
Kindly, mention if you are looking for UG or PG level courses. Alternatively you can check:
http://international.durhamcollege.ca/experience-durham-college/english-language-proficiency-elt-partners

Hi Pawan,
An overall band of 5.5 is quite low. You should consider retaking the IELTS. You can also complete a bridge course in English, but you should contact the universities first as they will guide you as per your profile. You must always meet the admission requirements for visa purposes. So, you should prepare accordingly.