You get MF/GF from Items
Not sure about the other classes but demon hunter has a skill called companion with a rune summons ferrets to give you GF and gather the gold for you.
There are no passive skills that increase your magic find. There are, however, a select few active skills that can be runed in order to recieve a magic find boost.
Passive skills such as increase Magic find or Gold find was hinted by Bashiok a while ago
Looking at the skill calculator, those bonuses seem to not have made the cut.
I don’t mind but I thought I would point it out in case people were planning MF/ GF builds?
Not sure about the other classes but demon hunter has a skill called companion with a rune summons ferrets to give you GF and gather the gold for you.
Threatening Shout with Obsidian rune = Enemies are badly shaken and have a 22% chance to drop additional treasure.
Battle Rage with Obsidian rune - Critical hits have a 20% chance to cause enemies to drop additional treasure or health globes.