Sorry, should have made it clearer - not the spare key as in the second key for the car, but the removable key within the electronic keys, which looks like a plastic version of any profile cut key used for the last 20-odd years. Under the flap on the door is a manual lock barrel.
If you're still having trouble, I'll have a crack with mine tonight (it's an MY08 as well) and photo each stage.
Otherwise, for a manual release of the bonnet, have a look under the bumper and see if the release cable is accessible.
MY08 Passat 2.0 TDI Wagon
Trialling golf ball aerodynamics theory - random pattern, administered about 1550 on Christmas Day, 2011.
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