My list of must haves for mc TC-30 would be
1) Rear Remote / Hydraulic Top Link
2) My bucket, and a toothbar for it. I would also get a pair of hooks attached to the bucket for chains to attach to. NOT for Pulling, but to easily chain large items to the bucket for moving things. Since the TC-30 doesnt have quick attach forks.
3) Lights, yes indeed. In the winter, daylight is short and I often need the extra time with lights to wrap things up. Whether it's just cleaning the tractor up, putting things away, or just to keep on working. Also find a really good set of rear mount floods are useful for when working on other things late at night the tractor is a portable go anywhere floodlight system.
4) 4WD.......
5) Optional Operator. A good cheap 8 dollar an hour operator is useful. For those very hot dry summers. Makes sipping tea in the shade much easier as they create the dust clouds that turn me from beat red with dabs of white from sun cream, to dusty tan. (SERIOUSLY though, that does raise the point, during dry hot summer months, good wrap around glasses and some type of dust mask. My place become a dust bowl quickly).
6) Extra disiel and let it abound. I hate being in a project and not having a fuel can to resupply.
7) Tractor Stuff, but not really on the tractor : Set of Chains, I love a floor mallet with my tractor (on side is metal other side is rubber, great for stuborn pins and implements etc.).
8) Drawbar thing a ma-jig - (It's a half figure eight looking thing that pins to the draw bar, really usefull to hook chains to, What is this thing called?).
Well that is all that comes to mind for me. Have fun, enjoy, play safe. Wear your seatbelt!!!