Well, the pumpkin head and the light bulb and swirling things - not sure.
What did surprise me is that you can set the WoW currency units for gold, silver and copper.
The command /run COPPER_PER_SILVER=x and similarly for SILVER_PER_GOLD allows the scale of the basic currency display to be changed. It does not change the price of anything, they are displayed based on number of coppers as you have requested, but it means you could run in old style 12 coppers per silver, and 20 silvers per gold if you like!
So now it looks like I have loads of gold (and pumpkin mush for brains) :-)