def toggle_numbers(numbers: list, totlength: int) -> list:
    """
    Given a list of integers called 'numbers', return the toggle of them from zero to totlength - 1.

    Args:
        numbers (list): Integers in the original list, in sorted order.
        totlength (int): Number of elements in complete list. Ex: [0, 1, 2, 3, ..., n - 1] has totlength n.

    Returns:
        list: A sorted list of all integers between 0 and totlength - 1, inclusive, not found in numbers.
    """
    complement = []
    if totlength:
        if not numbers:
            return [i for i in range(totlength)]
        j = 0
        for i in range(totlength):
            if i < numbers[j]:
                complement.append(i)
            else:
                j += 1
                if j >= len(numbers):
                    return complement + [k for k in range(i + 1, totlength)]
    return complement