Europe has a seemingly infinite amount of coal (same as everyone else), but obviously it's not exactly what anyone really wants (gas and even oil is more climate friendly than coal sadly).

North Sea oil and gas are long past its prime, Norwegian supply is already nearly as expensive as LNG shipped from half the world away. The ideal gas station is Siberia, but that is what it is currently.

So, dunno, what's left, the Arctic? Frack the polar bears?

Russia and Norway do. Most of that is Russia, which other countries in Europe still import from. Germany doesn't directly anymore, but there are indirect routes like through Azerbaijan.

Effectively. Europe and the UK do, but there isn't much easily accessible left and besides they aren't in the EU. Netherlands has had to close their gas fields. Germany still mines some coal...there are probably a couple of other gas fields etc but the big picture is that Europe is highly dependent on imports.