If the toads are small enough they certainly will eat them and the tadpoles too. If the toads are toxic as is the case with cane toads the goldfish/koi will be poisoned and may well die.
koi fish would normally eat goldfish food try tetra fin goldfish flakes they are made for goldfish and koi
Yes pond comets and other pond goldfish get along with koi, however koi can get over 24 inches long when a comet typically doesn't grow more than 12 inches- that's quite a considerable difference in size (which is why its often best to keep koi with other koi and goldfish with other goldfish).
I think it's KOI I have a friend who's is a really big koi lover. He is very adamant about the fact that koi are not goldfish!
Koi is a type of fish. Just don't put koi in the pond and it will not be a koi pond.
Goldfish do not have hair; instead, they have scales that cover their bodies which can vary in type and colour depending on which type of goldfish you have.
No they are not goldfish
The Chinese developed the goldfish. Koi were developed in Japan. So the answer is no.
Yes they can cross breed.
goldfish, koi
Koi
The oldest living goldfish in the world are Koi (singletail) most likely due to the fact that they are (normally) housed in large ponds. Although there are many fancy goldfish that live a long time, Koi surpass them in longevity.