GMAT

You are eligible to appear for GMAT examination to seek admission in International BSchools. Top BSchools criteria for MBA selection is GMAT score, overall academic performance, SOP, Profile of Students, demonstrated leadership skills, cultural fit to BSchool ethos, recommendation letter. Work experience is preferable but not mandatory. If you have excellent fitment on criteria mentioned above, you can get admission in International BSchools even without experience also.
Every year a large number of freshers get admission in MBA at International BSchools.
All the best.

TIME.
They provide not only good coaching and material for practice but also, they conduct various model exams every week and once the syllabus is over they conduct model exams every day for about 3 weeks.

Hi,
Check Thompson Rivers University and Vancouver Island University or look for PGDM programmes from SPP colleges.

There are universities like Thompson Rivers and Vancouver Island University which do not require GMAT. You may check their websites for details.

You have to take entrance exams like CAT, CMAT, etc. to get admission in the top management colleges in India. Basically, GMAT is for getting admission in top foreign management colleges, but some of the top colleges in India do accept GMAT scores.

Hi Neeraj,
It may not have a direct impact but a good GMAT score indicates your ability and skills. So, the employers value a good GMAT score. A good GMAT score will also lead you to a good business school which will eventually open up avenues. Also, there are many companies which asks for a GMAT score like McKinsey which means they do evaluate a candidate's academic ability. Read this:
http://www.mba.com/india/the-gmat-exam/about-the-gmat-exam/employers-value-the-gmat.aspx

It's better to compete in exams and get admission. It will help you to get exposure of best exams and colleges. Work hard and get admission in best B-School, it's not much difficult to score in exams.
Good luck.

If you want to do MBA from good colleges, I advice you to give CAT instead of GMAT.
If you want top foreign colleges, you have to give GMAT otherwise CAT is the best exam to get admission in top MBA colleges.
Apart from CAT, there is some good colleges which have their own entrance exam like XAT, IIFT, SNAP, NMAT, etc.