[v8volvo]

As for the engine that does not want to turn -- your buddy's advice is probably not going to get you very far. Yes some kind of lubricant might help free the pistons if they are in fact seized in rusted cylinder bores......... but if that is the case, getting it freed up to turn is not going to change much about the overall situation the engine is in, as the bores will be pitted by rust, rings damaged, and it will need a full teardown and overhaul to run. Further damage could occur to those parts from an attempt to get them moving around. So you don't gain a lot from the (significant) work of disassembling the fuel or glow system and could have something to lose. In either event it almost surely would not lead to a healthy running engine without major additional work, assuming your supposition about rusted cylinders is true.

And in the unlikely case that the engine did start after that treatment (remember you have 25 year old fuel in the fuel system too), that might be a bad outcome given the ancient timing belt. And furthermore still, you have information telling you that the timing was off when it last ran, so it's not gonna run any better now!

Did you try ngoma's suggestion of rotating the engine by hand with a ratchet? That is a safer way to try it than using the starter and will give you more of a "feel" for what is going on. Using the key and starter is not a good idea given all the unknowns you are dealing with -- could cause new problems. The best way to get this engine running will be by using great care and some patience. Quick and dirty methods could end up digging a deeper hole in terms of eventual reconditioning.

Sorry if our advice here doesn't sound as easy as some other advice you might have heard -- but we want to help give options that will have a real chance of success both for you and the car, which some other approaches would not.

Whatever path you go down, we welcome you to the group! Glad you found us here.