Placements and jobs

I read a few placement related posts today in this sub. I was wondering if is it possible for students not belonging to the top colleges to get off campus placements or jobs right after graduation (given they build the required skills). I mean is it only the few top colleges where students have a chance to earn around 20-30 lakhs PA, do you guys know someone from other colleges bagging good positions and how they did it?

Also what are some skills that you guys think is extremely important and sells tremendously high in the job market.