The OED has a reference to ‘speysse-bred and wine’ in 1550 and the inference is that this was richly flavoured bread or cake which contained raisins, plums, figs or the like.
As a noun, ‘spoil’ referred initially to loot or plunder, that is the ‘spoils of war’ and it was only much later that it came to be associated with damage.
Possibly associated with a kind of parole system, 'to spring' someone from gaol, either by paying to have the prisoner released or to advance a sum of money to achieve freedom.
The spruce fir is not a native English tree but takes its name from Prussia, a state known in the Middle Ages as Pruce or Spruce. The wood was imported [see pruce] and probably used to make chests, coffers and the like, although such items may themselves have been imported.