Colleges in Bangalore

By course, I am assuming that you mean a major field of study, or curriculum and not a specific class. The answer to the second part of your question is a resounding YES.
Most commercial airlines require an associates degree at a minimum to get hired on with almost all of the major airlines requiring a bachelors degree. It doesn't matter if your degree is in underwater basket weaving, a degree is a degree and it checks off the box for the requirement.
Specialized degrees, such as aviation business degrees are a great bonus, but won't necessarily get you a job with an airline. They also limit you down the road if you have an epiphany and realize that you hate flying. Now you have to redo a bunch of course work that probably won't transfer to another field or degree. I would pursue what you enjoy in a field of study and see if there is a way you can tie it into aviation. Something like electronics engineering with a specialty or minor in aviation comes to mind.
The one specific thing that you can do to help to become an airline pilot is to start flying as soon as possible. As I have eluded to in other answers, while having a degree may be a mandate to getting hired on with the airlines, having the 1500 flight hours is also a requirement (there are some exeptions to this rule). You could take every college level aviation course out there, and if you don't have flight time, you will be stuck doing something else other than flying for sure. Whether you do the flight training in conjunction with your college course work, or attend a flying school not affiliated with your college is up to you, and both have their strengths and weaknesses.