on most private servers, rogues/elemental shaman/arcane+frost mages are overpowered because of bugged skills or because their counter class has non working bugged skills. the best pvp is in arena if u like small scale team vs team pvp, with only objective to kill each other. if u like 10vs10 or 15vs15 and want to have objective like capture the flag or capture bases, than battlegrounds is the pvp for u. to make gold i suggest u take proffesions like enchanting or mining or other gathering proffessions like skinning because u can loot the mats and sell them for bigger profit. also endgame everyone buys enchants for their epic gear, so if u have enchanting proffession u can provide them enchants for gold. for leveling u can download joana's leveling guide(horde) or idemise's leveling guide(ally). usually i play undead and these are the areas i level in:
start:
tirisfal glades (1-10)
silverpine forest (10-20)
hillsbrad foothills (20-30)
arathi highlands (30-40)
these areas above are all connected so it was ez, now that ur level 40, fly back to undercity and take the zeppelin to ogrimmar, run down to tanaris (make sure u get flight paths on ur way)
tanaris (40-50)
go back to undercity and go to western plaguelands
western plague lands (50-56/maybe57)
eastern plague lands (56/57-60/61)
now u must go to outlands, so take zeppelin to stranglethornvale and go north to duskwood, east to deadwind pass, east to swamp of sorrow, south to blasted lands, in blasted lands u will find the dark portal that takes u to outlands
now u will be in hellfire peninsula, u can do some quests there for thrallmar/falcon watch to hit level 63 or 64
next to west to zangarmarsh if ur not 64 yet, maybe do some quest there
south to nagrand, here u will level to 68 or maybe more
if u still need some more exp to hit 70 go east to terrokar forrest (visit shatrah, its main city in outlands) and keep going east to shadowmoon valley, there in shadowmoon village u can find some ez quests to make u hit 70
attention: pay attention to flight paths, make sure u dont miss them because if u need to go back to a place, ur going to have to walk back :X