I like 2 fixture T5HO's but that depends on the size tank you have. I use that type fixture on my 20L but wouldn't do that on anything smaller. If you get a good commercial substrate with a high CEC (cation exchange capacity) which means the substrate can absorb nutrients from detris and the water and store them for use by the plants, get decent lights, then you can grow many plants without CO2. BUT I would strongly suggest using a product like Excel/API CO2 Booster/Glutaraldehyde to aid plants in photosynthesis and growth. It will help alot. I run my 220g on Glutaraldehyde and you can see how many plants I have if you click on the links at the bottom of the post. Also a good liquid fertilizer is also needed. You can do a liquid like Flouish Comprehensive if you have only a few plants but if you want alot of plants then using dry ferts is the way to go, it is also cheap.
As for easy beginner plants you can do water sprite, wisteria, swords, crypts, vals, ambulia, narrowleaf temple, bacopia, dwarf sag, red or green tiger lotus, and lots of others. Then good plants for attaching to DW are anubias, java ferns (regular and Wendilov), Bolbitus, and mosses.