Ammo: Try Federal Premium factory load with the 170gr. Nosler Partition bullet. Also, the Hornady factory ammo is good stuff for the 30-30. Remington Cor-Lokt in 170gr.
is also a good load. These all always shot accurately in my Marlin 30-30's, and performed well for hunting deer.

Sights: If you don't want a scope or peep sight you might want to check out Williams Gun Sight company. They make (or made) a replacement sight for the buckhorn on your rifle. It mounts in the dovetail, and you can get different sight blades for it too.
I always liked the shallow "V". They also make replacement beads for the front sight.
I had the larger white bead on my old 45-70 with the shallow V blade. Accurate, and very fast to work with.

Just FYI - Williams also makes the "FoolProof" peep sight, and it's a good one. Get the
twilight aparture with the larger opening. As for scopes, don't rule it out before taking a look a the Weaver 1-3x matte finish. Good scope for these rifles, and not too expensive.

Good luck.