I did some quick googling to double check you have a QR fork, which it appears you do. Thru-axles on trail bikes were uncommon then but not nonexistent. You should double check.
Wheel: You need any 26"/559 MTB disc wheel with a QR axle, which is a broad category. Even one from a different genre such as dirtjump/DH wheel would be physically compatible with the bike. You're looking at the right sort of thing. The main ways of messing up here would be getting something that's either thru axle, not a disc hub, or accidentally getting a 29" or 27.5" wheel.
Tire: Short answer is anything that says 26x2.3 (or narrower, ie 26x2.25) should be fine. The limit for that fork is nominally 2.4. Because tires are one of the areas where manufacturers can and do label things as smaller or larger than they actually are, there unfortunately is no magical way of knowing ahead of time beyond the shadow of a doubt that a given thing is going to fit, but that would more be something that could bite you if you were trying to run a 2.4.
Rotor:
If it says 160 and it's the right mounting (6-bolt versus centerlock) for your wheel it should be compatible. You should not expect it to work without having to adjust your brake, including resetting the pistons (fancy talk for inserting a thin degreased metal object between the pads and shoving them back into the caliper).
Fork:
$25US gets you the wiper seal kit for your fork, which is the basic seal kit that gets changed out as part of regular maintenance along with changing the oil. That's very different from overhaul. Overhaul means rebuilding the damper, replace bushings if needed, rebuild TALAS system, etc. If the fork is basically in good shape but just needs wipers and oil, that's very much worth it. If it's a heavily used 13 year old fork then yes, overhaul or replacement might make more sense. Note that if you're choosing between you personally sending the fork to Fox for $175 for overhaul but doing the removal and re-install yourself and getting a shop to install a whole new cheap fork, than the labor involved with the latter plus the cost of the fork itself can easily have you paying a ballpark similar amount for much less performance/quality, presuming a situation where the Fox was a good candidate for overhaul in the first place, i.e. no damage to stanchions or elsewhere. If you want to replace it, all you're really looking for is another 26" QR disc-compatible fork with 100-120mm of travel and the desired amount of tire clearance. Most forks today are now post mount for the brake, which just means you won't be using your brake adapter presuming you have the Juicy 7s that are listed as coming with the bike.
