Are the nuts exposed or counter sunk inside a wheel?
If they are exposed, take a chiselm, put a notch in them and lightly tap around them (air chisel works great). If they are countersunk inside the rim, you can do the same thing, but good chance you'll slip and damage the rim.
There is also a locking wheel nut removal tool available for when you loose your lock key (Crappy tire carries them) but I doubt they will fit the smaller wheel nuts. Chek if first before you purchase.
If they are real good and stripped, try hammering on a 1mm smaller socket or standard. sometime they take just enough to break them free.
As for the studs, your SOL there. Hopefully they can be purchased separately and not part of the hub. And if they are stripped, your probably over tourqing them or going on cross threaded. They wont strip from just taking off and on alot, that's just a myth.