I think it is more common to loosen all of the Fuel Injection Line Nuts at the Injectors and crank till you get Fuel out of all of them.

Some people only loosen a one of more and hope to get one cylinder or more cylinders going in hopes that the Fuel Injection Pump running faster will pump the air through the Injectors that they did not bleed.
But, that means that the Engine has to be able to start on the one or more Cylinders and in your case you are having trouble starting on any Cylinders.

Since apparently no one has been adjusting the Valves since you owned it how many miles do you think it has on it since the last valve adjustment or since you have owned it?

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84 300D, 82 Volvo 244Gl Diesel