In the majority of group PVP battles, it's fighters who initiate fights using charges WoTLK Gold, or unless there's one of your rogues or wizards who would like to start with a crowd control. In the event that one of your team members will start off with a sheep or sap make sure you hold off your charge and make sure that everyone is aware of the person you're targeting. It is generally recommended to concentrate on one target at a given time before shifting to the next one, but an organized group of opponents will naturally do exactly the same process. The first targets you should target are priests, shamans and wizards, and rogues which is why priests are probably the best option for an initial attack.
If your group is in trouble, notify everyone to put an end to the damage and then give them an Intimidating Shout. This will enable your threatened colleagues put a bit of distance between them and anyone who they were hurting and allow them to focus on the person you choose to target following the Shout is sounded and will give you an advantage on at least one of the targets.
We're not so sure. Taunt or other capabilities created to create a threat for your character in PVE are not effective for PVP which means that you'll not be able to force enemies into getting their attention on weaker players. The best thing you can do in most cases is to hit someone fighting with a friendly priest or mage or priest, and then tell the person to get off. A skilled player will stop their pursuit once they've been hamstrung, and will instead focus on you, which makes this a sort of Taunt even when they decide to buy WoTLK Classic Gold give chase, they'll only be out from the scene for a brief period of time and it's an ideal win-win scenario.