No, villagers do not eat.
Villagers aren't available on Minecraft P.E. yet.
There are villagers in the full version of Minecraft and the Minecraft demo. However there are no villagers in the Classic version of Minecraft, but it is possible for a server to create AI controlled entities (which mostly just stand there).
u cannot breed villagers
Not yet
because emeralds were added to be able to trade with the villagers
Not yet
No. That is impossible.
You cant unfortunately but there maybe a mod out there.
Villagers cannot breed in the current version of Minecraft XBox edition.
In singleplayer minecraft, you may get pickaxes from crafting them, trading with villagers or using hacks and/or mods
Yes i did i got 10 diamods for 3 emeralds in minecraft 1.3.1