WOW Gold: You can start a quest to collect in-game items to get the same effect
How do I set up a Cat Shop/Consignment shop? Press E to open your emote window, then look under trade WOW Gold. There should be a Consignment Shop button there to set one up.
Where do I find Inventory/Safe Extension stones and Cage? These are Cash shop items. Press O to open the Boutique, and then go to Items->Treasure to find these items.
Note that you don't need Safe extension stones or Cages to perform the corresponding action - You can start a quest to collect in-game items to get the same effect.
You need Dragon Quest items for the Safe extension, rare pet food to add Pet slots.
Legendary (gold name): Gold glow. Obtained by using materials and a mold (dropped from dungeon bosses) at a Legendary weapon forge in Archosaur.
Twilight (green name): Green glow. Obtained by using Twilight Temple materials at a Twilight Weapon forge in Archosaur. Any feedback would be greatly appreciated, and feel free to submit anything you think should be added.
At the bottom of the auction window are buttons to check your current bids and sales. To sell an item, go to the Sales window, drag the item to the box, and specify the information (a buy price isn't necessary).