WiKit and TclKit were designed to run out-of-the-box, with no installation or configuration whatsoever. This goes beyond what you are probably used to with software applications as elaborate as WiKit.
Enough said, let's get you started:
Welcome to WiKit!
You can put "tclkit" anywhere on your $PATH, it's just a runtime. The file "wikit.tkd" is an executable "scripted document" (containing all the scripts as well as a database with all the pages), and typing just "wikit.tkd" (or "./wikit.tkd") should also work. In fact, you can put "wikit.tkd" anywhere on your $PATH as well.
WiKit does not require Tcl/Tk or MetaKit [L2 ] to be installed on your system - nor does it care if they are (or will be, one day). Everything is wrapped up inside the TclKit standalone excutable. To uninstall WiKit: delete these two files again. To use this on another machine: move them. If it's a different platform: switch to the proper TclKit runtime and move only the "wikit.tkd" file.
That's all there is to it.