Moodle Help

Check out the menus right at the top.  Often referred to as the "Awesome bar"  See: http://moodle.org/plugins/view.php?plugin=theme_decaf

Below that, new in Moodle 2.0, the Moodle menus.

These are some of the main admin functions in Moodle.

Two top menus

Settings for any Moodle component

Finding your "My courses" list

Plus: changing your profile and your password

Inside courses: the "Course menu" block

This is an add-on, it is not standard Moodle.  It provides section to section navigation.  Click on the links in the menu.