Hey can i get sum advice on WOW? plz?

hi im a lvl 62 DK and im looking for a good place to get epic items, i have an loot atlas addon that tells me wich instance has wich boss drop what item, from commen to epic, ive looked up molten core but idk how to get into molten core from blackrock, any directions would be useful, also i have recently gotten my legend item and i want sum epics to go with that,also i am very short on gold, any instances recommended? im in hellfire peninsula at the moment just trying to go from instance to instance hoping to come across a useful epic for my DK, yeah im probably too low lvl to try farm for epics, but i need as much useful gear as i can get for now, cuz i am trying to beat a instance that can help me and my other toons big time, thx. also i have come across a sort of method where 20 or 25 players are in a raid and when a boss drops something like an epic, all the players try to bid for that item and the money goes into a pot, highest bid gets the item and when the bid is over or when the final boss is killed then the pot is split among the players evenly , wut is this called and how do i start one or join one because im game for getting good trinkets or gear for my toons. thx a bunch and have fun playing world of warcraft