[development] Creating different front pages

Hi everybody, I am newbie on Drupal and I would like to know how can i do to create different templates for each section of my website. I need a portal-like homepage, a bloglike template for each section and a simple article template for each content. Is there a simple way to do that? Do you have any tuto? The very best help would be the source code of theonion.com ... ;) Or something similar. Thanks for your help Michel Lévy-Provencal