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yes
You have to buy a transformer or converter from 220v to 110v.
Yes.
If the load you are connecting to the transformer uses 1.5 amps or less, yes.
No, it will destroy the 3 volt device.
They will only weakly glow. Make a rising transformer if it is AC, if DC it is still possible to make an amplifier.
step up transformer
Use a voltage devider or a transformer.
An example would be if you had a oil furnace, the ignition system would be a step up transformer. The step up 120 volt to 15000 volt transformer is used to ignite the fuel that comes out of the nozzle under high pressure to make the fuel burn.
By the volt metre.
The only way to do that is with a transformer. They make inline transformers that convert 230 to 115 and they simply plug in inline.
you get a transformer...