In Vanilla (non-modded) minecraft, the saddle is only useful for pigs. Even so, you'd have to use a carrot-on-a-stick to control said pig while being ridden.
With mods installed (a good example being the dragon mounts mod) it has extended usage. In 1.6 and above, horses will be introduced, however they will require a horse saddle, not a regular saddle which is exclusive to pigs only.
Pig.
Sorry, you can't, unless you make use of a mod.
You cannot make saddles in minecraft but hopefully you will in a later update, the only way you can get and use a saddle is if you find a dungeon with a chest.
It is impossible to get a saddle on Minecraft Pocket Edition without editing your inventory, a form of cheating, and do not function properly.
you cant only pigs can be rode with a saddle
no
you can't.
you can't.
Three leather
in dungeons
u cant
minecarts, pigs with a saddle on them and boats