Yes most small fridge compressors use a PTC starter, replacing the older current operated start switch. The 2 are designed to be interchanged, and you can have a start capacitor with the PTC or the current switch starter, which also provides overload protection, but almost no fridge freezer compressor will have one, they rely on the cap tube system equalising pressure between cycles so the compressor starts with low load.
If it was from a unit with R12 it would have had mineral oil as lubricant, but if it was used on R134A, R600 or other refrigerants the oil would have been POE, which is hygroscopic and which turns into acid when exposed to moisture, rusting the compressor internally.