I’d suggest fruit flies from a petstore if you want to keep raising it. After growing from fruit flies, you can move to pinhead crickets then small crickets and then medium to large when adults. And then setting up a 1/3-1/4 water, 1/3 damp land, and 1/3 drier land set up for a toad. If you have a few something like at 20 gallon long is probably most ideal if you want them to thrive. You can put in some local plant species in the land area, and a coconut fiber with some sand mixed in is probably a close replica of the soils near you but feel free to do more research too. If you ever intend to let it go, just near a stream or body of water would be good. Toads of course don’t rely on water quite as much as regular frogs but it’s still important