Plant ID, taking photos from top to bottom:
Echinodorus (sword), possibly E. parviflorus [the natural species, not "Tropica" variant]
Ammannia gracilis (probably)
Bascopa (stem plant in back), Eleocharis (commonly Hairgrass, the front plant) Anubias
On the light, we have discussed options previously. With the fixture you have taking a T8 single tube, the Life-Glo or ZooMed UltraSun would be the best tubes. Stem plants need more light than swords, so observe the plant's response. I have tried several plants over the years; some manage, some don't, and I stay with what will under my light.
CO2 would be pointless with moderate light, it would not balance and be wasted.