it takes a long time to get a lot of traffic to your website. your earnings will progressively increase each month but you can't expect to start raking in hundreds of dollars within the first few months.
for this you need to increase traffic and second thing your design and content must be good. keep your content unique and interesting your earning increase with time.
there's a lot of website transfer system like yoppu.com, increase your g+, create facebook fan page. create a group with your domain name as group name then add all your friends. use auto posting plugin like networkblog.
Yes as all of the other members have said I would also like to say that the adsense earnings is directly proportional to the number of visitors you get towards your website
one of the easiest ways to increase your AdSense revenue is video marketing. Another method that is very effective for me is marketing on forms that are specific to the AdSense ad or blog. I hope this helps