It depends on where you make your blog. Like, if you do it at blogger, then you can sign up for google adsense and get paid for when people click on your blogs. People don't really add you on blogger the way they do on livejournal. People may add your blog to their feed, or link to you from their blog.

sign up for an account at blogger.com and look around so you can ask some more specific questions, and I'll help you out.