I'd go 60 - 70 hp for a tractor on that size property and with those needs, and I would definitley have a bucket or front end loader on it. A 4 in 1 bucket is awfully nice. Besides the equipment Rancher mentioned, you would need a bushhog to move your pastures, something to drag or harrow pastures, a road blade, a manure spreader if you have horses in stalls, a spreader of some sort for lime, fertilizer and seed, a claw or spike if you're going to bale round bales, a hay elevator if you're going to bale squares, hay wagons to help put up hay, at least one "farm truck" that you won't put road tags on....
If you plan on having a garden, or farming anything other than hay, plows or discs are handy to have.
If you're doing your own fence, a post driver is about as handy as a pocket on a shirt.
Unless the land is VERY flat, 4W drive on the tractor and/or truck is good to have.
For a property that size, I would highly recommend a golf cart or some kind of utility vehicle like a John Deere Gator or a Kubota Mule. It might *seem* like a luxury at first, but trust me, it's pretty essential.
An equipment shed to put all this expensive stuff in; some sort of shop or shed so you can do oil changes, pump up tires and grease equipment.
Separate hay storage is a lovely thing.
I'm going to stop here, otherwise I could go on forever....