I would think about how you want to spend your time. I would definitely fix the leaks at some point but maybe you don't want to do it now. If you do everything else on your list, plus install a set of KYB strut inserts, you can start driving and enjoying the car. And, you can assess further what all needs to be addressed. If you pull the suspension apart and start painting all of the black under the car, you are starting a big project that likely renders your car on stands for a decently long time. Same goes for fixing the leaks. Those jobs open up multiple boxes of worms and could leave you without a car to enjoy for a while. Also, fixing the transmission seals is totally doable but it isn't an insignificant exercise. I did it last summer and it was pretty challenging getting the bolt that connects the shift fork to the shift rod removed (without damaging it) so I could replace the shifting o-ring and seal. Not trying to scare you. It is just not a clutch swap. It is a messy less than intuitive job if you have never been inside of a transmission before. Again though, it really depends on how you want to spend your time. If you really want to devote 6 months to getting all of these things right so you can drive and enjoy after then great. If you think you will get worn out and a bit frustrated when the car has been on stands for months and you can't drive it then maybe that tells you something also.