No, they start with the ability to use staffs and daggers. They can learn from a weapon trainer to use one handed swords. They also can use wands, but these are more for the stats on them than for...
No, the Warlock class does not gain a special flying mount as class ability. They use the same flying mounts everyone else does.
Almost any except wands,staffs and maces (both one and two handed). They also can not use shields. They can dual weild one handers.
right click them.
because blizz hated that we dominated the BG's so they nuked our skills