I'm sorry the toads are bothering you. I have a small page on deterring frogs and toads at
http://www.fishpondinfo.com/frogs/frogdeter.htmToads only breed for a few weeks and then should move on. The toads must not have other pond sources nearby so they were desperate to get to your pond. Where there's a will, there's a way. Are the baby toads still tadpoles or are they now adult toads? If they are tadpoles, you can net them out and move them. If they are babies, you can try to catch them or leave your door to the outside open as they want to leave soon after turning into adults. Few animals want to eat toads or toad tadpoles as they taste really bad. If you leave the newly morphed toads in the screened room, they will eat bugs. Most will die off; they have a high mortality. A few will survive to eat bugs until they can escape to the great outdoors. You can use a net to coax them towards the door to the outside. They are catchable; it just takes patience.
When goldfish are put into a pond, they are scared at first and will hide. When fish die, they sink at first but usually eventually float when well rotted. Many people think their new fish have died when they're just hiding. Goldfish can change colors and do so quite often when they're small. Goldfish start out brown/gray/blah and later get various reds, whites, etc. depending on their genetics. Those colors and patterns may continue to change. Your magically color changing goldfish are perfectly typical.
I hope you can escort the toads to life outdoors. Good luck!