From what I can see with a cursory Internet look, I'd say the diff oil has never been touched and doubtful that you could get the axle fill nut off, not to mention that the axle itself is on its last leg. The upper control arms need to be replaced, so might as well change the lowers as well. The right CV is leaking.
As Precision pointed out, what would concern me the most is the condition of the oil. It is hard to get the oil looking like such in the 5vz, so I would assume that normal maintenance has not been performed. If you had a scope to look underneath the valve cover, it could tell without bias if sludge is present.
IMHO, if you are getting this for under $2000, and are a shadtree mechanic with a high mechanical acumen, then maybe. Otherwise, I'd look harder for another one.