i'm 21, about to finish college with private and commercial license, great grades, and thinking about getting bachelors in aviation.
Now, will I be able to qualify at any local airlines with my small amount of flying hours? i've got less then 150 on multi-engine.
If yes, how do I do it? Do i just grab my license, and go to some local airline, and say "here i am, where is application, hire me, now!"?
What is typical minimum amount of hours do I need to fly on multi-engines, in order to be hired?

Oh, and no military advices, please

What is your total flight time? 150 hours multi-engine should be enough to get you an interview at a regional airline if you have 600-1000 or more total time. Most regional airlines require 1000 hours total time plus 100-200 multi-engine. A couple regionals only require about 600 total time, but it is hard to get a job with such low time. I suggest that you get your CFI certificate and start flight instructing for a year or two. Also traffic watch is good for building hours.
As soon as you meet the minimum requirements, you can apply to a regional airline. Don't apply before you meet the minimums. Most airlines have their minimum requirements on their website, just look under the employment section.
Typically you will have to fill out an online application or fax a resume to them. After that, you wait. Most airlines don't allow pilot applicants to contact them personally. Make sure to study hard for the interview and read lots of interview gouges (aviationinterviews.com). They have good tips. Good luck.

Yeah, you need to be a little more patient. Go get some time flight instructing. I just wanted to add that I have a little over 800 hours and haven't even considered applying yet.

oh wow, thanks for the answers, guys!
I just recently found out that my college offeres classes to recieve CFI training, so i'm deffinately gonna look foward to that. Thank you for your helpful relies!