A Creeper
No
Spawn a creeper egg and right click the ground. Or ./spawnmob creeper 100000
No 1 creeper only has one face
The creeper drops a music disc.
You can't
yes
No, creeper dragons do not yet exist in Minecraft. The only type of dragon that currently exists is the Enderdragon.
It was out about summer 2011.
Ocelots.
Creepers can not have kids in vanilla Minecraft. No hostile mobs in Minecraft can be bred.
No. Any explosions, no matter TNT or creeper, can destroy obsidian