I think that a cane toad (due to it's size) needs at least 20 gallons per toad. Even though they're generally very lazy, they can cover a lot of ground. I think 200 gallons would be the best size for a whopping 10 of these guys. They like to have personal space, and can grow to almost a foot, so I really wouldn't go a lot smaller than that.

The food choices best for this animal would be: large Dubia Roaches, large nightcrawlers (earthworms), appropriately sized mice and chicks (some find this inhumane), super worms, and virtually any other decent sized insect that's non-toxic. Calcium/vitamin dusting should occur when low-nutrient prey items are given. Gutload your prey well before feeding to maximize the nutritiousness of a meal. Fish probably wouldn't be the best idea because they're too small for the most part, and even in pet stores are commonly parasite-ridden.

I don't know exactly how high Canes can jump, but given that most normal sized toads can jump in the range of 6in to 1ft, I'd estimate their jump height to be 1 - 2 feet. Again, just a guess. And I do know they can jump fairly far.

In terms of culturing live food, earth worms (pesticide-free) would be an efficient food supply. You'd certainly want to spice up their lives a bit with some variety, though!

Good luck! - Robin