its not essentianl to level to 60, but you might want to pickup TBC (or a battlechest as they tend to be the best value for both a original and TBC) as it will give you the option of Dranei or Blood elf in you starting toons. It will also allow you to start levelling in these new areas rather than the standard ones (from experience the Dranei starting zones take you up to around 21 (when dual boxing) and then moved on to Darkshore for a couple of quests then ashenvale and at 25 moved to Duskwood.