Meguiar's has a wipe, like a baby wipe, that is categorized as a cleaner/conditioner. Easy and quick to apply. Great to have handy when you get dirt or a spill on your seats. You should find it at Wal-Mart or an auto parts store.
Yes, all car seat leather is coated/treated for protection. So don't use true leather cleaner. I like Meguiar's products, I have their leather spray, console spray and glass spray which I also use on the exterior paint and wheels.
Aerospace 303 is what you want. UV protestant, non-greasy, and stain resistant.
Don't use leather conditioners or cleaners, as modern seats are not traditional full-grain leather, but moreso a coated vinyl that will not absorb any moisturizer or conditioner. If you DO use a conditioning spray, all it will do is leave a film on the surface that will attract dust, dirt, and debris that will abrade the seats over time and actually cause more wear.