A question. How hard is it to still find parts for a 1995 Buick Century?
Not hard. You can check on rockauto.com, I imagine most parts are in stock.
But I’d look at cars '96 and newer, they have the OBD-II computer based diagnostic system, makes it a bit easier to figure out what’s wrong, and in Texas a lot easier to get emissions tested.
If you are going to sell the Tercel, be sure to go to that website I posted, you will get more for it from an enthusiast.