ColdFusion comes with extensive examples, tutorials, and help. These are installed along with ColdFusion (assuming that they were actually selected during the installation). The Getting Started applications are available via links in the ColdFusion Administrator welcome screen.
Two of the options on this page deserve special mention:
Select Explore Real-World Example Applications to browse two applications that demonstrate lots of ColdFusion functionality, along with the code used to build them.
Select Code Snippets by Feature and Task to display a Code Snippet Explorer that provides you with instant access to ColdFusion code used to perform various tasks, as well as narrated and interactive tutorials.