OMG so many things to tell you! But, one step at a time....
First, TypePad is a paid service that hosts your blog for you, whereas Wordpress.com and BlogSpot.com are free. Beyond that I don't know a lot, except that some people like them and other people don't. It's one of those things where you have to try it out for yourself to see if it's a good fit for you, and if you think it's worth paying for. You can try their "free trial" and be sure you take time to read all of their terms and conditions to be sure there isn't something there that you might find disagreeable.
On the ads you might choose to put on your site, there really isn't a way to "make" anyone click on them - the best you can do is to offer ads that are highly relevant to the reason they are coming to your site in the first place, which should - hopefully - make them "want" to click on the ads.
As for getting traffic, that takes time and work. You have to write - a LOT - of good content and stay focused on your niche so that Google and other search engines can understand what your site is about, and rank you for that according to how your site compares to other sites within your nice. A high ranking will mean plenty of site traffic. So you need to look at the other websites that are like yours to see what they are doing to get high ranking. Are the good sites? Do you like them? Study what they do carefully, and try to be like them.
It's critical to keep your focus narrow enough that you can dominate your niche, and it's critical to know what words (called keywords) will bring people to your site - those are the words and terms someone puts in the search box at Google or other search engines to find what they are looking for. Research all those words, and for each article pick a couple of those words or phrases and be sure to use them - in a natural sounding way - when you write. That way the search engines know to match up your site when someone searches on those words.
And of course you can promote your blog through social media networks like Twitter, Facebook, LinkedIn, MySpace, etc. Keep working at it and you will get site visitors.