Do I need a hub puller or special tools to swap this out?

Yes, the old hub needs to come off the spindle. A hub puller makes the job clean and fast; you'll also want a socket set and basic hand tools. If you don't have a puller, most shops will rent one or pull it for you on the cheap.

Will this stop the vibration I'm getting at highway speed?

If the vibration is coming from a bad bearing or hub play, this will fix it. If it's coming from brakes, tires, or suspension, this kit won't solve that—have the truck on a lift and check the other systems first.

Can I reuse the hub bolts, or do I need new ones?

The bolts that hold the hub to the spindle are reusable if they're in good shape. Inspect them for damage or stripping before reinstalling; if you're unsure, grab new ones at the hardware store—they're cheap insurance against comebacks.