Update: Got the shaft out!

So the seat shaft is just like this one.

Frame being steel, shaft being aluminum, I was told I'll never get it out. Went to a local bike shop today to get some idea's on parts and pricing and what he thinks of the bike. Told me its great if I can get the shaft out but 8/10 times they don't come out. Read up on the ammonia trick and hot cold stuff….

First, I put the shaft in a vice, removed the BB, and sprayed "Move It" penetrating lube down the shaft. Yes I know its not supposed to help an aluminum to steel bond but before I progress to ammonia I was trying this. Filled it right up and started twisiting. Wasn't moving, sprayed more, twisted harder. Finally, a budge! At that point I knew I had it. Just worked it back and forth until it finally came off!

With all the hard stuff out of the way, I'm figuring out what I'll be able to do on my own.

My expense list:

Re-pack hub's of both rims. 24.95 and 29.99
Rubber, maybe 50 - 60 a tire.
Cables.
Seat?

I hope to do most of the work myself in terms of cable wiring. I'll be giving the mechanisms a soak and lube, but the re-packing I think is out of my skill set. For 25 or so dollars a piece I figure I might as well. Is it hard to do? Should I bother doing it myself?