I changed a few on the back of my truck. You are going to need to get obviously the wheel studs, but you also need an inner rear hub seal.
Take tire off, or in your case, it might already have fallen off
If you do this job with the axle higher in the air than the other side, the gear oil loss will be pretty neglegable.
Remove caliper and bracket. then tap on disk till the rust breaks loose and remove.
Take 6 or 8 bolts off hub so you can pull floating axle shaft out.
The axle nut inside is a springoaded racheting style nut, so it will sounds like its grinding for the first few turns. You will need a 4 pin socket like a 42mm or something, or be gentle with a screwdriver and mallet. Driver side from what I remember is left hand thread. once you get that and the outer bearing off, you are going to have to pry on hub to basically break the inner seal to get the hub off.
Replace broken studs, remove old seal, and press new seal into hub. Do not tap seal in with a hammer, the flat metal ring will pop out of its crimping, and you will need another $25 seal.
Reinstall the hub, tirghtening down axle nut fully, then backing out 2 clicks on the racheting part. finish reasembeling in reverse order.