Yes, NATO as an organisation will hardly support Kurds either, but I can see that individual NATO members as well as other countries will start giving more and more moral and possibly economical support.
Not likely at all unless you have masses of them (which the Kurds don't have), though they may successfully harass attackers and reduce their bombing accuracy.
Does Turkey have guided bombs? And will they be re-supplied so that Turkish air force could use them at will?
Is it even "likely" that you can shoot down a jet with an manually operated anti aircraft gun? Sure it's "possible"