If you are looking for 100 "likes" simply to have 100+ fans on your page, go to fiverr [dot] com and buy them. In my experience, these will not be targeted fans or even long term fans to interact with, but it will get you to the magic 100 number quickly.
you can create a group in facebook an start adding friend there. may be I i will the one to join in you group.
Yeah thats a good option, but now its not there under 'EDIT PAGE' section like earlier. Wonder where they have put it... tried searching for it everywhere. It only shows up for new pages, not the older ones. Let me know if anyone knows where to find it in EDIT PAGE panel Cheers!
Ask your friends to be fan of your fan page and ask them to invite their friends to be fan of your facebook page
You will have to use your friend base, I wouldn't advise on buying fans as the quality and relevancy of the data may not be what you expect it to be. Start with your friend base and work your way up from there, always good to insert your fan page to various social directories such as twitter, digg and stumbleapon