Currently, there are sixty different tutorial windows explaining things from food to durability loss. There is still plenty of room for additions, but these are a great start. While my gallery may not show it, a lot of the tutorials highlight parts of your screen like your enemy health bars, your minimap, or your action bars themselves to help show what new players are supposed to be looking at.
Just a reminder that this is the PTR and these might end up changing or getting re-worded before they hit the live realms. If you have any constructive feedback on any of the tutorials in the gallery, please be sure to hit the US PTR forum or the EU PTR forum and let Blizzard know your thoughts on what they've already done or should add in the future.
Patch 3.3 is the last major patch of Wrath of the Lich King. With the new Icecrown Citadel 5-man dungeons and 10/25-man raid arriving soon, patch 3.3 will deal the final blow to the Arthas. WoW.com's Guide to Patch 3.3 will keep you updated with all the latest patch news.