Yes you will become a EU resident, but more important a French, Dutch, German, etc. resident. All countries have their own rules above the EU ones. Once in the EU you can move around as EU resident as you like. So there are EU rules for taxes, but every country has it's own specific rules for lets say state-tax and environmental requirements.
As far as I know you can bring your own Household goods without importduties and less complex technical requirements.
So contact your future country for details.