As far as loaded tires, some people have a reason to need them and others do not. If this tractor is not going to be used in applications which need the extra ballast, and will primarily be used mowing, then you would be better off without having them loaded.
Also, before you get loaded tires, you should read up on the various things used for loading, and the pros and cons of each.
As far as bucket hooks, read through my first link above. If you ever want to add the American Solutions grapple, that will affect the placement of hooks.
As far as Super UDT, that depends on the climate where you live. I live where it never freezes and regular UDT is more appropriate here. Having a gallon on hand and the right oil is excellent advice. Other things you'll need are a grease gun and some tubes of grease, coolant, something capable of inflating tires (you likely won't be able to cruise into the service station-I got a very good elec. air pump from Grainger), yellow fuel cans for diesel fuel (unless you have a big elevated tank and have a few hundred gallons delivered at a time, and a very large funnel (I have a 17" dia. funnel sold by a racing supply retailer).
Having a smooth paved surface makes it possible to put implements on custom built dollies and roll them right into allignment for attachment. Dollies are life savers, cost little, are easy to build, and a huge variety of casters is available online at N. H. Northern Tool and Supply and at Grainger. I keep my implements in a corner of the garage and move the cars out when I need to roll dollies around and change tractor implements. Having a strong beam overhead in the garage and a chain or electric hoist also makes lifting stuff easy. I got one of each for half off @ $40 @ Harbor Freight Tools.
Initially, I had 2 sets of tires, turf and ag, each on their own wheels. I got an inexpensive hydraulic jack and elec. impact wrench and correct socket (again during a 50% off sale from Harbor Freight) and could quick change wheels NASCAR style in a couple of minutes, but I discovered the turf tires got poor traction when plowing and doing hard toothbar loader work, while the ags did well there and did no damage to the lawn, so I now use the ags exclusively. If you live in snow, I agree about chains.
A very inexpensive ($99) attachment that comes in handy in many ways is a carry-all for the
3ph. You can haul all kinds of things around on it. I strap an ATV elec. sprayer to mine. Getting the sprayer without wheels and steel frame more than offset the cost of the carry-all. I put 1" rigid casters on the bottom for easy movement; it slides under the brush hog (on its dolly) for storage and I hoist the rear blade piggyback onto the brush hog with the elec. hoist. The tripple stacking saves space. There are a couple of carry-alls available at Northern, maybe also at TSC (Tractor Supply Co.) as well. The 15 gal. sprayer came from Northern for less than $100, and without a frame, it is easily lifted up into garage trusses for storage.
C6rider, did you get first free service at home? If so, you have one of the most accommodating dealers I've ever heard of. If you got this, I'm impressed.