Wow, reading your post left me without breath! If you want to post-edit your questions/answers to make corrections, you can register - I suggest as "JamesJoyce" (it's free, I've checked) or "StreamOfConsciousness" ;D

Back to business, I've never used Perl/Tk other than for trying it, but I've seen that googling a bit shouldn't be that bad; in particular, this and this seem interesting.

BTW, my search keys were "perl/tk set font", and I tried them in the Super Search as well. There is an interesting post that should be both funny and instructive for your case: A Perl/Tk version of the 3-card trick.