I'd like to start growing the sunsugar tomoatoes indoors-can anyone give me some advice on getting started... the types of chemicals to use, what to look out for, etc.
Sun Sugar is an indeterminate, so it will be challenging. You'll need a system that can accommodate a very large plant.
It would be easier to find a determinate or dwarf variety that you like and grow it. Although it's a red cherry, and not orange, I really like Terrenzo. It's very sweet. Lizzano is similar.
General Hydroponics flora series of nutrients are probably the most widely-used hydro nutrients. You may also want some Cal Mag with Iron. Magnesium is often the first minor nutrient deficiency tomatoes develop. If you are pumping nutrient solution with a mag-drive pump, you may need to add iron, too.
I agree with what Cole_Robbie suggested regarding General Hydroponics flora series.