yes or else emeralds are almost useless
nope
Yes you should be able to. Check that your minecraft pe is version 0.6.0 or 0.6.1 If it is either of those then you can make armor and use it
There is no such thing as an emerald pickaxe in Minecraft.
Yes there is armor
there currently isn't armor in minecraft pe but there will be in v0.6.0 which will be released soon
Leather armor
The best armor in that mod is Halite armor.
Nope....
No
Diamond armor is definitely the best armor in minecraft. It protects you the most and last for a really long time.
You cannot make horse armor in Minecraft. Instead, you need to find it in dungeon chests.
Emerald ore is 129. Emerald block is 133. Emerald stone is 388.