2)
Not. You can have magnetic coupling even when two inductive elements do not have the same inductance. Look at a standard transformer--One winding has a higher inductance than the other (unless it's just an isolation transformer, but let's not get into that right now), but they are still magnetically coupled.
Resonance does not require two coils. Resonance is when a capacitor and an inductor oscillate at their own natural frequency. Resonance is a characteristic of a capacitor and an inductor, not of two inductors.