Sienna oil pan gasket problem & cv axle question, how hard to fix and still purchase?

So, I have a Kia Sedona already and have changed both CV axles and a number of other repairs. A hassle, not great at it, but can get it done eventually.

So, I was in need of a back up to keep the family moving while repairing 1 vehicle, and dont have the funds for a brand new one.

My aunt has a 2002 Toyota Sienna. She is quite upper class, was the original owner of it and has taken it to the Toyota dealership for everything. INCLUDING getting AIR in the tires. Has 200k miles on. All records are available, very meticulously maintained. It does, however, need some work:

A cv axle (waiting on her copy of the diagnosis to verity)
Both brake rotors and brake drums
oil pan gasket is leaking (they estimated 500 dollars so I assume it was the lower)

My aunt is willing to sell it to me for 500. I feel like thats a solid price if I can make all the repairs myself.

The only thing that worries me is this oil pan gasket. I have read that it might be something else leaking so am planning to find some dye and test it out. I am also wondering about the cv axle...it took me over 3 weeks to change both of mine in the kia because of all the rusted parts, etc. Are there some real challenges I might be unaware of, and does anyone know if the strut needs to be compressed or removed before working on the sienna cv axle?

Any unknown unknowns you know of I should be aware of Sorry for the general nature of the question, but I dont even own it yet so havent had a chance to learn enough to focus my questions directly.