For the OP
@namuwilliams, your transmission should be your top priority. The other items are trivial compared to the trans going out.
For that mileage, it's time for a rebuilt transmission. But if you drive it until it stops moving, the time from when it begins being noticeable(the slipping gets bad) until it stops, that is described as burning up a trans. That period of driving is what ruins a trans, forever. After that the success rate of rebuilding it is well under 50%.
If you rebuild a trans before it gets burned up, which means internally tons of debris is spread throughout and does unseen damage to VB components, the success rate is 90% or better. That means if you do it while the trans works okay and the fluid isn't black, it should work like new for another 200k miles. If you wait until it burns up, rebuilds may last a year, two tops, or it may only go weeks or months before failing again.
There are things you could do. I would change the fluid first, new Mercon V and a filter, draining the torque converter too. That should take nine quarts or so, total is 12+ when the valve body is loosened(which holds the rest up above it).
Mileage doesn't kill a trans, it's virtually always the wear of certain serviceable parts in the VB or case. You could pay someone to install new solenoids and accumulators, and a few special Sonnax parts, but the trick there is the person doing the work. It's critical to have someone familiar with that trans(4R70W) do the work, so no mistakes are made. Most shops won't touch a trans as a small job like that. The labor is 2-3 hours for them, and they'd make very little compared to a full rebuild. Thus they absolutely always insist on a full rebuild, so they get to charge you $2000 etc. Plus the rebuild doesn't include any of the Sonnax parts or any shift improvement items(parts or labor).
But 95% of all older vehicles need only those things which the trans shop doesn't do in a normal rebuild. They are after the profit only, they don't care about you a bit, and if they say otherwise, they are lying to you. The hard parts which they replace included in a rebuild, those run under $200, and will last indefinitely if the VB/solenoids/accumulators are kept working efficiently.
My current 98 truck has a slow 1/2 shift that I do not like, that is a slightly slipping shift that will ruin the trans sooner or later. I have not had time to service the trans as I'd like, I have only changed the fluid and filter, plus a deeper pan. I have the parts needed to replace what I mentioned, and it is easily a 4-5 hour job for a non professional. It's on my wish list of soon to do items.