Boss 1(Lucifron),2(Magmadar),4(garr): http://www.blizzardguides.com/mc_molten_core_bosses.html
Boss 3 (Gehennas): Pretty simple fight. Mages will have to decurse the shit out of the raid tho. Rest is mostly max range for hunters, get adds down then boss. Keep moving boss away from fire.
Boss 5(Shazzrah): You will spread out like a beautiful half moon, melee stay out. Have a tank stand spread out in the moon. The boss will blink and do arcane explotion. And when he blinks the tank will pick the boss up and run it back to MT. at 20%-ish melee can go in and swing the shit out of him.
Boss 6(Baron Geddon): Baron have like 2 spells. And the most important one is. He puts a bomb on 1 target. That target have to run to freaking africa before it blows or he will wipe the whole raid. Most of the times guilds and Pugs have a surtain area for you to run if u have the bomb (Like back into the tunnel or up against a wall with a roof over you so you dont take fall dmg)
Boss 7(Golemagg): https://www.youtube.com/watch?v=CpfoV4JHcZw This fight pretty much shows everything. hunters pull back dogs and tank them. They are not supposed to die. Tanks swaps on stacks. Melee run away when they have 5 stacks of the debuff. Then run back when debuff is gone.
Boss 8(Sulfuron Hardbringer): From my experience all u need to do is to pull 1 add down at a time and kill them. Kick and pummel when they are casting. And then tank and spank boss basicly. With some kicks and stuff
Boss 9(Major HOMO): You pretty much get tanks assigned to adds. Sheep the healer-adds. Kill everything except boss. RL will mark the assigned target with Skull and then you kill the add. He will also teleport a random person to the middle of the room, when he does u run back to your poss and continue what you were doing. When all adds are dead, major domo will run back and give you a sweet chest with loot.
Boss 10(Mr RAGGYY): http://www.wowwiki.com/Ragnaros_(tactics) This is still pretty accurate.
It's been a while but i think i got the most important parts covered. I dont know if this helped at all but I hope so. :)
//Sewz