I want to create a forum..

First question:

How do I create a forum in Drupal, which modules can I use?

Second question:

I like the feauter that when I post a message in the forum, I'll recieve a note in my mail inbox that someone has replied.. Then I can click the link to the forum reply, or I can choose to unsubscribe to the notification service. (This is easy in Joomla, but overall I like Drupal and not Joomla ;)