No, Creepers just flee from them.
Yes, creepers were an error, they messed up a pig...
Nothing.
Creepers and Ghasts will sometimes drop it when you kill them.
yes, you just need flint or a bone
There aren't "ancient creepers" in the application version of Minecraft, there are creepers.
It's called Minecraft... creepers have ALWAYS been in Minecraft.
Creepers don't burn in the sunlight because they aren't programmed too! The only Mobs that currently burn in sunlight are Zombies and Skeletons. No other Mobs will burn in sunlight. Also, Zombies/Skeletons can still do the player damage whilst on fire.
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.