So when you have the starter edition of WOW and you want to upgrade to the full edition do you have to buy the extra Add-Ons or does it come for free when you buy the full game from the starter edition?
Buying "World of Warcraft" from Blizzard's store includes the base game, The Burning Crusade, Wrath of the Lich King, Cataclysm, and Mists of Pandaria (basically, all the content up to level 90). Warlords of Draenor is sold separately.
If you first play the starter edition for a little while(free trial) the launcher store will give you the option to upgrade your account for HALF THE PRICE it currently is in store. By playing for a little while you can save abour 43-56% over buying the game first.
Its also may be cheaper to buy the warlords of draenor expansion at game stop for 29.99+ tax currently. Walmart also has the battle chest for $13 and change +tax.