Only if the owner/maker of the server requires it. It's an add-on mod. It's not part of the normal server.
If you are in a server, most servers are /tpa (players name) if its not there do /help and maybe u can find it
Yes. However, offline servers do not require a real Minecraft account, but require Minecraft SP.
At least 98% of all Minecraft servers are free. Classic Minecraft is always free and does not require you to buy and download the full version of the game. However it has limited abilities and blocks compared to the full version. Minecraft creative and Minecraft survival require you to buy the full version. Once you have bought the full version, full version servers are completely free. See the related links below for more information.
/setwarp (name of warp)
No, you only require the necessary mods that server is using.
Classic Servers: Classic servers are free for all to play. Creative/Survival/Hardcore: Many of these servers require you to fill in an application in the servers "official" thread on the Minecraft forum. Most of the time, servers are "whitelisted". Which means you cannot access the server unless your application has been approved. You will be automatically kicked by the server if it does not recognise your name. Some servers are not whitelisted and are free for anybody to join on condition that you follow the server rules. Take a look at the Minecraft forums to see which servers require you to apply or which are free for anybody to join.
Premium means that you bought Minecraft, not playing it for free. Some servers require premium status to play on.
No, there is not any good servers for Minecraft 1.6.6. In fact, there are no more 1.6.6 servers at all. There are only updated servers. My recamendation is for you to update minecraft. All of the servers, or the most active, always update.
it is a challenge map meaning you must download it from a website like the minecraft forums you can find servers that will have it but they require bukkit for you to install on to the server
no you need minecraft beta to play beta servers
You play online in Minecraft by connecting to servers. Multiplayer servers will have either an IP, or a DNS (such as craftmine.mchost.net as an example). They both require the same method to connect - Direct connect and paste or type the IP/DNS in the "Server Address" what is said. To find some Minecraft servers, check out the official Minecraft forum site, in the related links below.
Minecraft servers cost money to run, it's not likely someone will give you a server for free. Servers require a computer, internet connection, and electricity and all of these cost money.