Hello,
Guys, the easiest way is to simply translate the writting on the back
So, for picture #4 it is:
Oberfedlwebel Gűnter Eberhard, 28.4.1943 Herzogenaurach, pilot instructor at the fighter school.
BTW, all the aviation photos from this seller are from the lot of Fw. Desimir Furtinović, who was trained in JG104 from 01.04.1943 until 15.09.1943. After that period he joined the 15.(kroat.)/JG52. Before he was himself a pilot instructor with A/B 123 in Agram and Graz/Thalerhof.