I actually didn’t spec into it. From what I recall, it wasn’t worth it for where I was at.
Did you try asking your mom? 
Without having my computer in front of me, I can’t try anything to see what might be going on. You could try it later, or make sure you’re deleting it on an Administrator account.
Not much. IIRC, a BM Hunter will pass more of their Stam over to their pet, so it’s more useful for them (if they’re soloing), but IMO Agi will always be better.
Welcome to Outland: Land of Rainbow Clown Suits.
1.) There are dungeons starting as early as about level 10 (though you can’t queue for them using the random LFG feature until 15 or so). At-level, these are run with five-man groups: one tank, one healer, and three DPS (damage-dealers). Groups who overlevel or outgear an instance might run it with a smaller group–or even solo. Raids are available at levels 60, 70, and 80, and were designed for the endgame at their release. Older raids are available in one size each: 10, 20, 25, or 40. WotLK raids are each available in 10- or 25-man versions.
2.) Dungeons vary greatly in the length of time they take to complete, depending on the instance in question, the skill/gear/level of the players, and how many bosses they choose to kill (if any are optional). Most lower-level instances will take at least 30 minutes, but probably closer to an hour–longer if you get a large instance and decide to clear all of it.
3.) If you need to get back to real life mid-dungeon, you leave. Unless you have a good reason for doing so, this is considered rather rude, especially if you’re the tank or the healer (a role that will be harder to replace). In a normal dungeon, there is no penalty for leaving before an instance is complete. TBC and WotLK dungeons have Heroic versions; while the number of times you run a regular instance is limited only by the five-instances-an-hour lockout, you may run any given Heroic dungeon only once per day. Once you kill the first boss of any Heroic dungeon, you are “locked” to that version of it until tomorrow. (So, if you skip out in the middle of a Heroic, that’s your one chance, unless you can convince that group of people to wait for you and all come back later to finish it.)
IMO, the battle was pretty poorly designed. It works like the very end of the DK starting chain, if you’ve done that. Everyone who’s on that stage of the quest sees the same phased area, and the event repeats constantly. So if you show up early, you have to wait around, and if you show up late, there’s nothing to guide you to where you’re supposed to be.
Generally speaking, the game will send you on delivery quests to higher-level zones in the vicinity of where you’re currently questing. However, it doesn’t always do this, and the zone it sends you to might not be the best one for your level, so it always pays to take a look at a zone list like the one linked earlier.
“Look and see” can work, but sometimes you’ll find very high-level areas immediately adjascent to very low-level once. For instance, to the east of the Undead starting zone Tirisfal Glades, you’ll find the Western Plaguelands, where the mobs are in their 50s. Particularly notable are the “welcome bears”–plagued bears that roam just past the Bulwark (at the border between the zones), which often run up to [del]rip the heads off of[/del] give unsuspecting new lowbies a hug.
Wooooooooooo!
AFAIK, all Relics are a pain in the ass to find. I don’t think there are a lot of BoE ones–mostly they’re available from dungeons, raids, and badges.
They were a clue that Anub’Arak was the final boss of ToC. After you defeat the “last” boss (Twin Valks), the LK comes out, mocks you for building the colliseum over “[his] empire” (i.e., more of the Nerubian kingdom), and breaks the floor open, and you fall into the cave where Anub is waiting for you.
