One advantage of proper sepia toning is that it is more stable. The black in a B+W print is silver, andd can be slowly affected by chemicals in the air. Sepie toning, and others, replace the silver with something else, often a more durable metal. Colour prints don't have any silver in the final result, they use coloured dyes and will fade. Inkjet printers have similar problems with fading dyes. Don't worry about sepia toning yet, a lot of old photographs are basic silver anyway.