I just bought Minecraft. Now, my brother wants to play with me but my Mom doesn't want to buy another. We use the same Wifi network. Can we do this?
I suggest setting up a lan world. that's realy easy if your computers are connected over wifi. and a LAN(Local Access Network) is setup between the two computers. also logging in to minecraft as far as i remember isn't required so you would not need 2 accounts. (At least when the LAN system came first out, if not you should downgrade to a minecraft where you are able to log in)
first open ANY singleplayer world, you can make a new one for this as well.
press Esc and click "open to LAN", there are some basic settings which I don't have to explain because they are very easy to use (think of gamemode and cheats on or off).
go to your brothers computer and go to the multyplayer section.
all LAN worlds(in your case only your LAN world) will apear at the bottom of the list and your brother will be able to join them.
note: you must be qwithin range of the wifi and the LAN to be able to join this world, friends in other homes can't play on this server.
if you have problems with the connection you can read these questions:
You can't play together unless you both have different accounts. If its just a case of him wanting to play the game he can play on your account and just make up his own world, but you couldn't play on multiplayer unless you had separate accounts. Don't try to illegally download minecraft anywhere, they'll most definitely be viruses.