Yes, into the ground rail (9V plugged in).
You can also play around with different values for C3 and C4 to find what you like.
The Test Kitched forum has some great breadboarding tutorials.
The bottom section is the power section. It uses a TC1044SCPA and few other parts to be able to provide -9V along with polarity protection (1N5817) from your wall wart or other power supply and powering on a LED.. If you're going to breadboard this first there is no need to use it. Simply flip...
The footswitch may be possible. IME, I've only received one dud in the mail. If it works in bypass we can confirm the 3pdt half works (which I think is position 1 in the pic below). You can use your meter to check for continuity on the switch itself.
Does the circuit work when it is not boxed...