A plant that size definitely needs more light. Up at the top of the page there's a Search feature, type CFL in there as a keyword and read, read, read! Most plants respond best to specific color spectrum's during the different stages of growth. Start there so you'll get an idea of what kinds of lighting you should invest in.

Stinky mentioned a balanced fertilizer, with an even NPK (i.e., 5-5-5) to try and get things sorted out. This isn't always ideal, and again will generally change depending on what stage of growth you're in, but your plant has some issues that need to be resolved if you expect to yield anything from it. If you're growing in soil, there are plenty of organic fertilizers that work really great... but you'll need to get a better understanding of the basics first, then worry about advanced methods of growing later. Here's a great place to start spending time: Grow FAQs.

When you've had your fill there, go back through many of the posts in the Growing forums. There's a ton of information for you to absorb there... so get started now, and you'll eventually gain a better grasp on the complexities involved in growing a good crop. Plus, you'll gain some really good insight into checking pH, making quality soil mixes, the various fertilizers on the market and what they're good for, and so on. Good luck.