I would get at least 4, IMO a 10 gallon is too small for most cories except the pygmies (habrosus, pygmaseus, hastatus and aspies) since they are just so active and most get between 2 and 3 inches.
They all get along, I doubt they'll interbreed but it's possible given their similarities, highly unlikely though since they rarely school with different species of cories. That's one problem, if you get a school, get one of the same species. Bronze and paleatus cories don't school together, but bronze albino cories and bronze cories school together and paleatus and albino paleatus school together but they seem to be able to tell the difference in species.
For the eggs, they'll lay them on the glass and if you want to hatch them without risking the fry being eaten by other tankmates then you can carefully scrape them off into a plastic container and move them to a hatching/rearing tank. Keep them in the water at all times though.
Cories will eat any fry they catch, they won't catch many but if one happens to swim underneath them and fits in their mouth, they'll gobble it up.
i have two albino corys and 2 emerald green corys and they school together most of the time. they wont do anything to other fish and are the funniest fish to watch scatter and swim all over the aquarium. mine especially love playing in plants. good luck finding some you want! http://www.azgardens.com/c-75-cory-c...rium-fish.aspx
this website has dwarf panda cory cats you were looking for :
and skunk corys which you might like as theyre similar
they only get about 2 inches long and both are under 3$ which isnt bad at all. usually they do 2 day shipping too
I would not use azgardens to buy fish, they have a horrible customer reputation. I know someone who made a giant order, many species of tetras, cories and other fish, half the cories died, one of the habrosus cories was an oto, all of the pygmaseus were habrosus, the emperor tetras were kerri tetras, most of the nerite snails died and they were charged a ton for shipping and some of the fish had plastic net (like the onion bag stuff) floating around their bags, one of the cories was stuck in it and dead... That's just one bad experience I've heard out of many...
you will see increased activity with 6+ rather than 3+ if its a possibility
*(almost)all the species are peaceful and go together, and will often "hang out" but they are really happy and active looking with 6+ of the same species. I would generally consider 3 to be a breeding trio rather than a shoal, which is what the common species of cory desire. Check out these videos if you have time
*I believe there are a few larger species that are somewhat territorial and you have to watch about adding too many males, but those species are not as common and are a whole nother kettle of fish no pun intended.
Some types you may not want to will interbreed, but not cross species. One example would be albino cory aeneus, and regular bronze corys will most likely produce displeasing-looking offsping