What? It shouldn't be like that... hmm... do you have any mods installed?
Finding creepers is just like finding zombies, they're random. You just make the difficulty anything but peaceful and you explore until you come across mobs, you keep doing that until one of the mobs you meet is a creepr.
No they have not come out with a trading or money system in minecraft yet, keep dreaming...
Lions can only be found on Minecraft if Mo' Creatures Mod is used. If you would like to keep your lions, keep the Mo' Creatures Mod.
One of the Minecraft files that are required to start it may be corrupted. Uninstall and reinstall Minecraft and see if that fixes it.
I keep finding them
it does not do that
They said that minecraft would never be a "finished product", and that adding more stuff periodically would keep users interested in the game.
/gamemode keepInventory true
it's impossible to do so.
get a life mate
play minecraft
to keep inventory you can do /gamerule keepinventory true or /gamerule keepinventory false