There are many Content Management Softwares to host blogs. Right now the common one is Wordpress (which is good enough for beginners). You may try alternatives like Movable Type or Drupal, if you want.

Don't host your site off blogger. Get your own host and domain name, then go through the many money making opportunities already discussed to fund your expenses.

With WP, you can insert as many widgets as you want. Just remember to get the latest versions of Wordpress to avoid exploitation of bugs.

Oh, and to make things easier for you, when you purchase your own hosting, try to ask your host for CPanel and then Fantastico. Fantastico makes your life so much easier, I tell you.