There are two kinds of multiplayer, split-screen and online. Split-screen is when two (or more) people play together at the same console. You don't need internet for that. To play online with people from all over the world, you'll need internet.
Yes, you can play split screen multiplayer without an internet connection. You only need internet if you plan on playing with people online. Note that if you are playing a game that allows online splitscreen multiplayer you will need an internet connection.
Yes you need internet to play online multiplayer
Yes, ofcourse? You need internet to connect to the servers.
To download it from the website you need internet connection of course but once it has been downloaded you can play in singleplayer with no internet. To play on a multiplayer server you do need to have internet.
you need to have wireless internet
Yes you do.
Yes, Internet is required for downloading DLC and Multiplayer content.
As in multiplayer? You will need and internet connection and/or Wi-Fi.
A Computer, a keyboard, a mouse, internet
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".
It doesn't need one unless you want to connect to the PSNetwork, or play multiplayer online.
You need an internet access account and you need to go onto multiplayer and then quick play.