Check out example codes for "how to save toggle values unity". It will help you in understanding the concepts better.

Code Example 1

public Toggle Toggle;

    private void Start() {
        if ((PlayerPrefs.GetInt("ToggleBool") == 1)) {
            Toggle.isOn = true
        }
        else {
            Toggle.isOn = false;
        }
    }

    private void Update() {
        if (Toggle.isOn == true) {
            PlayerPrefs.SetInt("ToggleBool", 1);
        }
        else {
            PlayerPrefs.SetInt("ToggleBool", 0);
        }

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