If you have an amphibian pet you can no longer care for, do not release it in the wild.
Instead, contact a local reptile rescue or animal sanctuary. Sometimes pet stores will even take in unwanted amphibians.
Releasing the toads in the wild in California could introduce a foreign disease to native populations, or just as worse perhaps introduce exotic toads to the environment. There are a number of amphibian species introduced into California that are not native (for instance bullfrogs and African clawed frogs) and they are causing major problems for other aquatic wildlife.