Yes. You can mod a ToUcam for DSO work, but it depends on the sort of results you are looking for?
IMO (and this is a very subjective comment) - I've yet to see any long exposure work carried out by a ToUcam which you wouldn't consider a little rough.
Just my opinion. They just don't make for much of a DSO cam.
Yes... however... a handy way to cut your teeth without shelling out the big bucks, and you'll always have it as a very nice planetary/lunar cam