Dark matter just provided excellent coverage of your question...doubt I could do better
But also keep in mind that at your level, there are also cheaper and almost as effective options. One I really enjoy using are sharpening stones (weight stone for you hammer/mace buffs out there) A +2 to +3 to yoru weapon at that level from a sharpening stone and your plowing through the mobs. throw a coouple of armor kits on your chest, hands, feet and , uh , whatever else you can put armor kits on and yoru pretty much set
and both of those items can be had usually for silvers a stack. You might get hit for 30-50s for a stack of sharpening stones, but one stack will easily last you 5 levels or more where you are at, and by that time you've more then made enough to buy another stack.
and enchanting is one of my favorite tradeskill for a rogue (just ask Aerianne, she was irritated that I made her take the skill, but she sure likes the nifty glow on her swords now

) however, at the younger stages of your cutpurse career you might just want to farm. I usually pick up enchanting at around 20...thats where you really start to get alot of items that are worth disenchanting (the big reason fI get the skill at lower levels...I really hate selling all those quest items i get that I cant use

) But it really comes in handy at higher levels, and a quick way to make $.
you make more $ by selling the materials you get from disenchanting, by the way...I Will usually run a lower level instance with Aerianne, diesenchant everythign i get and sell the mats (materials) on the AH.