Differential takes 1.3L (SAE90 GL-5 specified)
Auto it lists 9.8L for 13B, 11.6L for 20B. As with any auto, the amount you need to flush it depends on how you do it, e.g. just dropping pan will only change ~4L. It specifes Mazda ATF M-III, but Dexron II or higher should work.