I have a 40 breeder, too, it's a great tank.
Lighting will depend on whether you just want to see the fish or if you're going to attempt to grow live plants. If you just want to see the fish, most any light fixture would do, like something like this:
Fluorescent Strip Light - Black - 36" You would also need a lid, like this:
Aquarium Hoods & Canopies: Aqueon Versa-Tops If you want to grow live plants, you'd need to figure out what kind of plants you want (low-medium-high light) and get the appropriate lighting fixture (as well as Co2, ferts, etc if you're getting into higher light).
For a filter, I'd suggest a canister. I have an Eheim 2215 on mine and it does its job well. Fluval makes pretty good canisters too.
For a heater, I'd suggest an adjustable one, that way you can control the temp. I use an Aqueon heater, never had an issue with it. You should also get an in-tank thermometer, like this, to double-check the temp:
Floating Glass Thermometer
For substrate, you can decide between sand and gravel. I like sand better as it looks more natural but it's up to you. If you're planning to have bottom dwelling fish like corys or a pleco then they would prefer sand.
Is this your first tank? If so you might want to read up on cycling. This guide should help:
Guide to Starting a Freshwater Aquarium - Aquarium Advice
For fish you have a lot of options; are there any fish you're particularly interested in?
