Turkmenistan is under Russian influence. They will not help Turkey against Russia. Azerbaijan also has Russian influence and also has dealings with Israel. They won't help Turkey either.
Russian junk fighters? That is some arrogance there.
Turkey has already been conquered by UK-USA after WW1. Turkey has had several coups favouring USA in the past. Turkey today may have freed itself under Erdogan but the past legacy doesn't change.
Russia is the ally if Syria, not of the rebels. Why would Russia help anyone else? Russia has helped Syrians survive and even win back several cities. With such huge distance from Russian mainland and so many complexities involved, Russia has done a lot to protect its ally.