Short answer: You don't need all that stuff. Special "animation supply" only makes sense as long as you work in a traditional studio environment where this kind of standardized material is still in use.
As an independent animator, especially when working (mostly) digital, you don't need any of those.
Long answer:
Nearly everything those animation suppliers sell can be had at other places for less money, or even done yourself. The only thing you need to buy there would be an original Acme punch - but only if you have to work on punched paper at all. A lighttable can easily build by yourself, even an animation disk. See here
http://www.flipbook-online.de/viewtopic.php?t=712 for a tutorial, there are dozens of others.
The paper format doesn't matter at all. Draw exactly the size you're comfortable with. If you
really need 12 F paper, any decent print shop in your neighbourhood will cut it for you in eact these dimensions, or your local paper supplier will, if you buy a minimum amount.
If you don't know the differences between 12F and 15F and don't know what they're used for - then you don't need it. Instead invest in one of the better books about animation production, like one from Tony White.
