As mentioned already - live foods are a must, and lots of them.. if you think you have enough, divide the cultures more. I mainly use BBS, Banana and Walter worms - I have 6-8 cultures of each of the worms.. that will get you through the first month or so. After that you can decide if you want to try to get them on manufactured/frozen food or continue to grow them on live foods.. at which time you will need to learn about black, white and grindal worm keeping.
I would use the 40g grow out rather than a 10g if your spawn is larger than 15.. you can grow roughly 5-8 to large sizes in the 10g.. anything more you will want to use the 40g.
They do have spoons/humps which will carry on to the spawn, but you can try to work it out by breeding the best of the babies, and then again the best, etc.. by the 5th or 6th gen you will want to bring in some new genes. But I wouldn't worry too much about their toplines right now unless you were planning to show them. If you are breeding for the love of the fish/hobby then focus on healthy fish. Down the road you can concentrate on getting show fish once you get an understanding of breeding and feel comfortable enough to spend a bit more for show pairs.
But these guys are lovely, have pretty colors/patterns. You fell in love with them and that is what is important. Breed because you want to, as this isn't a hobby to make money by any means. You saw my "experiment" spawn- lots of faults in them, but they were still cute and each one was sold within 24hrs. So don't worry about their topline, worry about that when you go to breed for show.
I don't think I can even begin to list what all I use and need to breed.. small things like q-tips and extra airline hoses come in handy. It's an almost never ending spending spree when it comes to breeding :(