How many miles on the car?
If this is an IM with the engine/transaxle moved 2” forward, as many of them are, and it has significant mileage on it, then two new complete drive axles at $75 USD each (at NAPA) might make more sense than just replacing the boots (easier, too).
If it does have the engine/transaxle moved forward, then the boots (and joints) are going to wear out faster than straighter axle angles (it just makes sense as they have to flex more).
IRS is so much easier to work on compared to Swing arm. As Mike mentioned, you’ll need a 9-point Torx bit to remove/replace the bolts. Removing the entire axle is pretty easy. If you have lockwashers under the bolt heads they are all re-useable. If the bolt heads are serrated with no lockwashers, they should NOT be reused and you’ll need new bolts (or you can add lockwashers).
When re-installing, don’t forget the stabilizing plates, line up two opposite bolts on each end to get things lined up and then just install everything finger tight. Then, check your VW manual for the torque settings for the torx bolts, tighten everything up and do not over-tighten.
Once out and on the bench, use lots of rags to clean it up (if you go the boot only route) and follow Mike’s suggestions.
Oh, and the axles are attached to the transaxle drive collars, and those have their own set of seals. When you remove the axles nothing leaks on the transaxle end.