10 gallon on the cheap...
Keep your desk lamp - or get a desk lamp that looks nicer. Way cheaper than any aquarium lighting system. And replacement bulbs will be easy to find as well. A 10 is pretty small, and it's really easy to overdo the lighting, which will likely mean algae battles.
I've never used eco complete, but if you've got it, use it. If it's not the right color your looking for then just cap it with sand.
If your looking for low maintenance plants - go with anubias, java fern, mosses are great too.
With a pH like that, use driftwood, or maybe even peat in your substrate.