There's no way to breed creepers in the original version 1.5.2 there are mods that you can install to breed mobs.
There aren't "ancient creepers" in the application version of Minecraft, there are creepers.
It's called Minecraft... creepers have ALWAYS been in Minecraft.
No, Creepers just flee from them.
Yes, creepers were an error, they messed up a pig...
Yes
No hostile mobs (including creepers) are present in peaceful difficulty.
Yes
Yes, they will explode.
Nothing.
They explode once they sees you.
Kill Creepers.
Yes