Ok, Toni. You have a long road ahead of you. I've been blogging for 5 years now and in the beginning I had to set a calendar reminder to remind me to write a post. So that's your first goal - regular writing.
Next, find some forums where your target audience hang out. If you're writing about parenting then find forums on that subject and make sure your blog address is in your signature block. When appropriate add to a discussion with your thoughts and then if you've written a blogpost that backs that item up, give a link to it. For example, yesterday on another forum there was a discussion about people copying websites and plagiarism. In 2007 I'd written two lengthy posts on this subject with relevant links to help victims. I was able to add to the conversation and then added the links for the two blogposts. This brought in quite a few visitors. Be careful not to do it unless relevant to the conversation otherwise it may be viewed as spamming.
If people feel what you write about complements their blogs and is relevant they will link back to you. Likewise, if you find blogs you feel relate to your blog, then add them to your blogroll. The blog owners will notice as it will show up in their stats.
Yes, it is important to leave comments on other blogs - providing you are adding to the conversation. Make sure you always leave the link for your blog in the name/url section as it will bring in more visitors.
No, I have not paid for the Google
PR or Alexa
PR. This has all happened over time and is measured by the popularity of my blogs, the number of visits, searches done at the search engines, and so on.
So, you can eventually make money but not a lot and there is a lot of work involved and time. Unfortunately you can't shortcut the time thing.
Now, for those who make a lot of money blogging. They usually get paid to blog on particular topics and they already have proven blogs with tons of visitors and usually have adverts that attract attention too. I know a couple of these guys in Australia and they'd be listed in the top bloggers globally.