I have a foreign bike, and don't know what pressure to pump it to I have this old bike, I assume it's Italian from what I've been told by the former owner, and a Google search, but some parts say "Made in France" and "Made is Switzerland", etc... The tires are very mysterious in the way they display pressure. "25-622 (7000)" is what the tire says, along with "25-622 700c  Michelin —ELAN" I don't know the unit, and 622 psi seems wrong. Someone please tell me how much pressure is acceptable?
25-622 and 700C are both ways of stating the size of the wheel, not the pressure.
25-622 is an ISO size: the tyre is 25 mm rim-to-rim, and 622 mm in diameter. 700C is a more traditional name for the diameter, which is more often known as 28 inch. ISO sizes are somewhat out of fashion these days, as there's less variation in wheel size. See the late Sheldon Brown's excellent tyre size guide for more information if you're interested.

According to VeloBase, Michelin Elan tyres are "rated to 100 psi" but shouldn't be inflated to more than 90.