How do i know if i need to replace my springs or my trac bar?
Hello and welcome. All good advice above, especially tackling one thing at a time as your confidence grows. You mentioned new steering tie rods. Did you purchase new tie rods and drag link as a kit (like the kit from Wild Horses)? If so, that is good as you can mark that off your list. Since you are at a stock lift, your original trac bar should be good. The bushing kit you mentioned should have the track bar bushings. As long as the new bushings fit in nice and tight you are good to go on that.
https://www.wildhorses4x4.com/product/Tie_Rod_Drag_Link_3way_Adjustable_6675yr/66-75_TIE_RODS
Same with your springs. They could be sagging due to age, but I wouldn't worry about that unless you want to lift the Bronco up a little bit. Take care of replacing the steering components first.
In your new bushing kit, you will have what is referred to as C Bushings. They can be tricky to install, so take a look at this video. I wish I had a video to watch when I did my first set of C bushings!!