When you are of the appropriate level for flying mounts in Northrend, you can just fly your mount there. Other wise there is an NPC in Kraus's Landing that will send you there when you are high enough. Once there find the flight point for your faction, and you can just use the flight points to come and go. Also, if you are there for the battle, you need to talk to one of the battlemasters in your factions capital cities and que for it.
Currently you can not use a flying mount while Wintergrasp battles are going on.
Vehicles for wintergrasp are made by going to the workshop after you have reached a certain rank (kill a few people).
As of Patch 3.1 of World of Warcraft, there are no longer any "daily" quests in Wintergrasp. They've been moved to being "weekly" quests. There's a lot of information about the quests in Wintergrasp, including the random weekly quest players will want to hunt down. See the link to WoWWiki's page on Wintergrasp Quests to get the full deal.
Technically, if you can get to Wintergrasp, you can fight there. However, the que system for WG gives preference to level 80 characters before any other level.
In Dalaran's Alliance or Horde Building
In one of the recent content patches, Blizzard made it so you can Que up for Wintergrasp from the battle-masters place in capital cities. If you are chosen to participate (they also narrowed how many people can actually participate) you will be teleported to Wintergrasp a few minutes before the battle begins. On top of that, there is a portal in Dalaran at the other PvP portals, between two battlemages on top of the stairs leading up.
WG means Wintergrasp, a zone in Northrend where PVP happens a lot, and a battleground that happens every 2 hours.
Titanium is mined from the Northrend zones. Specifically, the mid to upper level zones like Wintergrasp, Sholazar Basin, Icecrown, Storm Peaks, Dragonblight, and Crystalsong Forest.
Due to blizzards recent change in the games programming and containing folder; I don't recommend going on anymore private servers. The built in security software, The Warden, now scans the game files every 30 minutes or so for any changes. If any are detected, it's sent off to Blizzard for further action to be taken. But still; if you're playing ATM you'll notice how bad Wintergrasp is, and that's being supported on Blizz's already well-kept servers. So I think that a normal Private server running it would just be havoc.
PvE Starting KitCraftablesBladeborn Leggings, Footpads of Impending Death (Ilevel 265)Knightbane Carapace, Bracers of Swift Death (iLevel 265)Death-warmed Belt (iLevel 226)BoE from the Auction HouseIkifirus' Sack of Wonder (iLevel 265, ICC) - replaces Knightbane CarapaceAs for weapons, starting items like the SuperNumary Sticker are good starter items, or even weapons bought from Reputation Vendors or quest rewards. From here on, the best option is to run heroics to replace all lower-level items and get some decent trinkets. After a bit of time, use Emblems of Triumph and Emblems of Frost to replace any lower-level items you can, or slots for which no good item dropped.Priority should be to get your Tier-10 gear from the vendor, buying Shoulders and Helm items first because they are the hardest to acquire. After that, go for a good trinket.PvP Starting KitFor the PvP Starting Kit, the best you can get is the Relentless Gladiator's kit, which can be bought using Emblems of Frost or Honor. You can also get a good set of shoulders from the Wintergrasp Vendors for Marks of Wintergrasp. The first buy should be a Medallion of the Alliance, for the Resilience and get-out-jail free card (unless you are a Human).Your best bet will be to run Wintergrasp and do the weekly quests for it anytime you can, and save up for more pieces. Wintergrasp is massive and you can find safety in numbers, picking off stragglers as you go.You might not even need good PvP gear, but if you want to feel safe have a Leatherworker craft Eviscerator's Chestguard, Facemask, Shoulderguard, Waistguards, Treads and Legguards for a Resilience buffer and good starting stats.
To get heirloom armour you must have a level 80 character and do heroic dungeons or raids. From these you obtain either Emblem Of Triumph or Emblem Of Frost. It is using these that you can purchase heirloom armour; Chest, Shoulders, and One-Handed Weapons are 40 Emblems each, Trinkets are 50 Emblems, and Two-Handed weapons are 65 Emblems. However, you can also obtain Stone Keeper's Shards from dungeons and raids when your faction is in control of Wintergrasp; you can use these shards to purchase shoulder armour and weapons from the Wintergrasp vendor.
Tol Barad is the Cataclysm outdoor PVP zone and daily quest hub, kinda like Wintergrasp and Isle of Quel'Dalas mixed together. Whoever controls the prison (control is obtained by a battle every 2hrs or so) has access to dailies that have even better rewards than the other dailies on the island and is eligible to go into the instance that is located there.