Rogue PvP Twink Level 19

At first you should level your character to level 10. Your professions should be Engineer and Mining, because so you can get with 150 Engineer the Green Tinted Goggles. You can also try to get the Lucky Fishing Hat, but that's really hard.
Then start to go Deadmines till you get the Cruel Barb and the Blackened Defias Armor. The Barb isn't too important for people who has got a lil' bit more money. You can also get later the Assasine's Blade or the Warsong Dagger, or maybe both. For the Horde you can do the Chain Quest of the Wailing Caverns, get the 4 gems and get Wingblade. The alliance should get the Seal of Wrynn and the horde the Seal of Sylvanas. The best belt for a rogue is the Deviat Scale Belt, you can get the scales from the monsters in Wailing Caverns. On some realms it could be very expensive: the Sentry Cloak, but it has got good stats. If you've got all these items level till 19.

At 19 begin to go PvP if you haven't got any or only one blue weapon, so you can get the Warsong Dagger and Sword. For a rogue is the dagger better.

Enchants:

Weapons:
- 15 Agility
- Fiery Weapon (low cost)
- Lifestealing (expensive, but cool)
- Crusader

Armour:
- Chest + 100 Health
- Chest + 3/4 all stats
- Bracer + 7/9 Stamina
- Gloves + 15 Agility
- Legs + 30 Stamina, + 10 Agility
- Boots + 7 Agility
- Boots + 7 Stamina