By Kevin Buckland, Bloomberg Toyota has sold enough cars to put one outside every Japanese home. Now, it wants to put robots inside. Well-known for its automated assembly lines, Toyota sees a not-so-far-off future in which robots transcend the factory and become commonplace in homes, helping with chores — and even offering companionship — in an aging society where a quarter of the population is older than 65 and millions of seniors live alone. Machines have become much smarter in the last decade or so.