Getting started with Tcl/Tk is quick and easy!
First, get a copy of Tcl and Tk for your computer.
Second, check out the documentation section of this website for tutorials, books, and demos. Be sure to check out many of the fantastic community resources that are available. Make particular note of the Tcler's Wiki which contains many tutorials and sample code.
Last, but not least see the list of related websites found at our core developement site.