Purchased Rise of Runelords but nothing shows up in the art library

I purchased Rise of Runelords, but nothing shows up in the art library. No tokens, no maps, nothing. There are maps in the page toolbar and they have tokens placed on the maps already, but they can not be edited.

I don't think anything of that module adds art assets to your art library. As you noticed, you have maps set up in pages. You should be able to see characters and handouts in the journals tab. There should also be a token page that has all of the token images linked to their respective character sheets. But in general, modules do not add loose art assets to your library.

Oh okay. This is the first time I've used this site. I assumed that I would be able to search for tokens in the library and add them to encounters on the fly. So any time I want to add a token to a map I have to go to the token page, copy and then go back to the map and paste? Will players see me doing this?

To them the creature will suddenly appear. You can paste things onto the GM layer, and they will be invisible until you switch them to the token layer. The maps should be set up with all the tokens for the encounter already in place. Some of them may be on the GM layer, depending on the encounter. If the creature is in the Paizo Bestiary, you can drag from there and Roll20 will place the version that is already in the campaign. I'm not familiar with the module, but let's say it has goblins in it. Normally if you drag a goblin in from the basic Paizo compendium, it will come in without a token. If there is a goblin in the module, dragging a goblin in from the compendium will place the version you already have in the game, token art and all.

I have not purchased the Bestiary or Compendium, but it sounds like it would make things more easily searchable. Thanks for the advice. 

Sorry, part of the confusion is that I don't play PF and wasn't sure of the terminology. The Bestiary is a purchase; the Compendium is free.