I use DNF nutrients. (Dutch Nutrient Formula) I use the 2 part mix. For me to get one bottle (500ml) of Part A and one of Part B for both Veg and bloom formulas (4 bottles total) I paid $24 CDN so like £10. nice and cheap and work great for me. you don't need anything crazy to start. Stay cheap and low budget as much as you can until you figure stuff out. Other than the cfls, if you can get your hands on the T5 high out put lamps they work good too. I use only T5HO in my garden with great results. I have to worry about heat so I can't go to the Full hid systems. I want to switch to the Ufo system LED but I can't afford that right now. Check out Sunblaster just google it, there you will see the high output T5s. If you want cheap and good cfls were great advise. The more light you can get the better. Just aim for around 6500k for veg and arounf 2700K for flowering. If you are going to use only cfls and what you have get as many as you can fit as they are no where near as strong as what else is out there. they will work just not as good, in other words you will not get as much as you can when you harvest.
Just get any Veg nutrients from your local hydroponics shop. If they ask you what you are growing just tell them that you are growing tomatoes, they are the closest thing to what we grow. If they ask what kind well make something up...no sorry just know a few varities. Beefeater, I have starfires, there are heirloom.
Good luck.