I don't want to send you all over the internet, but here's what I would do.
1) Go to Liberty Flights
Electronic Cigarette - Starter Kits - Riva 510 and buy a RIVA 510 Carto Delux. It is same thread as eGo, and will have two batteries, charger, cartos, and case for $35. There is a 20% off button at the top of the page.
2) Go to either Joogler Juice
Joogler Juice or VaporGod
Home | VaporGod.com | Best selection of e-juices for your e-cigarettes! and buy some dual coil cartomizers. They are $9 per pack of 5, and should last 4-6 hours each. Each box will come with a free 5ml bottle of juice (your choice of flavor). Get a couple packs, get a couple flavors.
3) Go to a good juice vendor's website. KickBassVapor, QuicknicJuice, and BackwoodsBrew are my favorite 3. Order a couple 15 or 30 ml bottles of some flavor that sounds good. If it isn't good, you can sell them here (good vendors = easy to sell). Some juice may need to steep (set for a week while the flavors blend). Most are fine out of the mailbox.
The RIVA batteries do really well with the dual coils. Make sure you fill the duals all the way the first time. Drip around the edge to soak the fibers, not into the middle hole. I fill until they drip out the bottom. Overfill them, then blow out the excess. You should be able to see through them.
Start with 3-4 cartomizers, each with a different flavor. Just top off the cartos each morning before work (or night). Mark cartos with nail polish or tape as to what flavor each is.