Do I need a bearing press to install this?

No. The bearing is already pressed and sealed into the hub as one unit. You're replacing the entire assembly at the suspension mount points—just remove the old one and bolt the new one in place.

What bolts or hardware do I need to install it?

The assembly bolts to your factory suspension attachment points. Use the fasteners that came out with the old hub, or source new ones matching your OEM specs. Your service manual will list the torque values.

Can I repack or service the bearing later?

These sealed bearing assemblies are not designed for repacking. When the bearing fails, you replace the entire hub. That's the tradeoff for the simpler installation and sealed protection against dirt and moisture.