My count is 273 pressed pennies to be found at the 4 theme parks and Downtown Disney. There are also 40 pressed quarters at those locations.
If you were to search out all of the other machines at WDW you would find 138 other pennies and 34 quarters.
My numbers may not be exact, but they will be very close.
Pressed pennies will need 2 quarters to operate, and pressed quarters will cost an additional 4 quarters to operate (a few only require 3).
If you were to try to get 1 of every pressed coin it would cost a grand total of approximately $400.00. You will never get them all in one trip, there is always machines that are out of service.
One other note. If you are a collector of pressed pennies, if you can, it is best to use pennies that are dated 1983 or erlier. These pennies are made of copper. Pennies made 1984 to present are made of copper plated zinc. You will find that the zinc will create silver colored stripes on your pennies. And also, if you wash the coins and remove tarnish before you press them they look very nice. It is difficult to clean them after they have been pressed, and will remove their luster.
After typing all of this I now realize that I know way too much about this subject to not be cnsidered obsessed. I don't know where to find a 12 step program for something like this.
I never understood why I keep getting soda out of that machine at my work, I thought I was going to get a penny with the words "Diet Coke" embossed on it.