I know there a lot of guides for twinks but there was some stuff that could have been better. (this is alliance based)
You should be a gnome or a dwarf (don't be a night elf they are noob)
Head: Green Tinted Goggles / Lucky Fishing Hat
Neck: Pvp
Shoulders: Talbar Mantle
Chest: Tunic Of Westfall
Waist: Deviate Scale Belt
Legs: Leggings of the Fang
Feet: Feet Of The Lynx / Nat Pagle's Extreme Anglin' Boots
Cape: Glowing Lizardscale Cloak
Finger1: Pvp
Finger2: Lavishly Jeweled Ring
Main Hand: Assassin's Blade / Shadowfang / Stinging Viper
Off Hand: Assassin's Blade / Cruel Barb / Skeletal Club
Range: Venomstrike / Lil Timmy's Peashooter
You can put enchants that you think will make you better on what ever.
Talents:
1) Malice x5, Improved Sinister Strike x2, Lightning Reflexes x3
2) Master Of Deception x5, Opportunity x5
3) Master Of Deception x5, Drty tricks x2, Camouflage x3
4) Malice x5, Improved Eviscerate x3, Improved Backstab x2
Tell me if I left out anything