What sort of setup do you want? An African lake cichlid tank? Planted? Shell dwellers? Brackish?
For lighting the easiest and most cost effective way for a tank your size is to put a couple of 150watt Metal Halides on it. Fittings are cheap, and can be bought off Trademe or other various online sights. If you are wanting to get serious with plants and maybe want to grow a glosso carpet or something like that, or lots of red plants, then you can use a brighter light, like 250watt or 300watt. And when you need to replace bulbs, you'll only have two to replace, whereas if you wanted a large amount of light but used flourescent tubes then there would be a lot of tubes that would need replacing! You will also need a nutritious substrate for plants. Here's a good article: http://home.infinet.net/teban/substrat.htm