I would change everything. With that many miles on the RENI I would bet it's blown. Seeing oil on the front isn't a good sign. 8's have had a problem with corrosion on the oil cooler lines and splitting. So it's a good bet that's happened if it's been a northern car all its life.
I would recommend a complete fluid change, new plugs and especially new coils. A fully charged battery, real 91 or so gas fill to at least half a tank and try to start her.
Things to check/clean the SSV and the MAP sensor. Both are known to cause hard starting issues.
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