NATO is hardly going to support Turkey's adventures in Syria so it'll have little relevance for that fight.
And while the Turkish have far more firepower and air power than Kurds, the terrain is extremely favourable for a defending force, particularly when it is as motivated and well-trained as the Kurdish fighters. A Turkish attack can become a debacle, or at militarily "best", a massacre of civilian population resulting in further alienating Turkey from civilization.
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?
And while the Turkish have far more firepower and air power than Kurds, the terrain is extremely favourable for a defending force, particularly when it is as motivated and well-trained as the Kurdish fighters. A Turkish attack can become a debacle, or at militarily "best", a massacre of civilian population resulting in further alienating Turkey from civilization.