Purely based upon observed production methods, i'd conclude the following:
-The only real thing of value to the Asgard is neutronium. anything else can be replicated. food, shelter, medicine, technology. Money would not exist, everything belongs to everyone.
-The Goa'uld are evil oppressors who take what they want. slaves are forced to build their stuff, and the naquahdah they use is mined by slaves. their Jaffa are kept in line both by fear and necessity of Goauld symbionts, so everything is free to them.
-The Ori are ascended, so any real material would be of no value to them. their worshippers more or less are slaves, so the Goauld situation kind of applies.
-the Wraith grow everything, so production costs are zero. their also feed on humans, so food costs nothing, and they seem to have no civilians whatsoever.
-the Ancients, Nox and Furlings likely have the same scenario as the Asgard.
anyone i missed?
Earth has money because sufficient effort is involved with production and material acquiring. Plus, it also stimulates a human's efforts, so it works. if production and mining gets so advanced that it costs practically nothing, or if the methods of mining and producing are non-voluntairy and unpaid, basically no money is required anymore