You cannot
Yes. But do your best to disable them instead of hurting them.
I'd recommend purchasing Minecraft instead of getting it illegally. There are a few cracked versions out there, and I've tested them myself. They're not as fast as the actual Minecraft and don't have many of the features the real Minecraft has... $24.75 for Minecraft at the moment...
Use your email in the username box instead.
You cannot make horse armor in Minecraft. Instead, you need to find it in dungeon chests.
They dont sell it anymore. You should buy Minecraft instead
you can find them around in dungeons or abandoned mineshafts in minecraft beta1.8 ut you can't acually break it you get string instead of a block
Instead of disabling it, just don't drink. That works just as well
You can not tame villagers in Minecraft. They breed naturally instead.
pixelmon requires the forge instead of normal patching
Edit - Settings - Expressions - (at the end) check box: Display emoticons as text instead of images
Getting onto Minecraft Multiplayer is very simple. All you need to do is when you get onto Minecraft you click "Multiplayer" instead of "Singleplayer", "Mods and Texturepacks" or"Options" and type in the Multiplayer IP (which you can get from the Internet or a freind) and click "Connect".
You'd be better off to solve that problem looking up what Minecraft is instead of asking here how you can show him that you understand. Just make him ask you "What is Minecraft". Then of course you explain to him by showing him you know what it is. And of course you can always play a game of it with him.