The first EVER version of Minecraft was called "The Cave Game" Pre. The first official version of Minecraft was Creative. The first official version of Survival Minecraft was InDev, which is an abbreviation of In Development.
They were first introduced in the 1.3 Beta Version of Minecraft.
When Minecraft first came out you could get Minecraft for free. Now that Minecraft has entered Beta version you have to pay for it.
21$ for beta version
Infdev
Nope and yes.It is like a demo for the full version of minecraft.
Not sure if that's possible but i do know a free version of minecraft that get's updated 24/7, Minecraftforfree.com
You can play the demo version or Minecraft Classic on the Minecraft website.
no its like a demo
Minecraft commands were first seen in bukkit server. We do not know when the first commands were made for bukkit servers however
there are no rumors for minecraft pe version 4.1
maybe your minecraft is for windows or you haven't actually purchase the real version, like using anjocaido's minecraft launcher