All GoTo does is turn your drives for you and point stuff out. If you can find stuff yourself, or want to, then forget GoTo. Technically, all you would really need is a RA drive, but both axes might be nice anyway and I doubt they come separately from Celestron anymore. I'm surprised you didn't get them along with the scope/mount - are you sure your mount's not motorized? A polar alignment scope (if you don't have one) will be useful, but not as much so for your type of photography.
With the object in the field of view, you will probably want a Mogg adapter for your Toucam so that you can fit it in place of 1.25" eyepieces, or use it with barlows and any other number accessories. Other than that you don't need anything else. If you plan on doing long exposures with your webcam (probably not) then some of the things that the Celestron guy suggested would apply.
Honestly, though, with a bit of practice you could do without motors as well. You're not going to be taking long exposure shots, and even if you were you could still do without motors on a quality mount