What exactly are you looking to find out? What I can gather from the pictures you provided:

• The holder of this passport, Siegfried Markowitz, was in fact Jewish (hence the last name and the red "J" stamp). On Austrian and German passports, Jews were required to be identified through these stamps beginning in late 1938. If they were not surrendered to be stamped, they would become invalid. As you can see, Mr. Markowitz surrendered his passport and it was stamped on August 4th, 1938.

• On August 4th, 1938, not only was the passport stamped but the administrative fee of 67 Rpf (Rpf = Reichspfennig) was paid, allowing a "one-time departure to all European countries". The handwriting adds the USA, Mexico, and Australia to this list. The rest of the stamp is faded so I can't tell if it says that "further travel through the German Reich is [allowed, forbidden, or something else]".

• Days later, by August 16th, 1938, Mr. Markowitz left to Yugoslavia. The stamp in the seventh photo is from the "General Consulate of Yugoslavia" and is written in (I believe) Serbian. I read Cyrillic but don't speak Serbian so I'm not sure if the stamps marked "TRANSIT SANS ARRÊT" ("travel without stop") are translated correctly into French, but I assume that this means he wasn't permitted to settle there? Yugoslavia was invaded partitioned by the Axis powers by 1941, and by the end of the war, about 66,000 of Yugoslavia's 80,000 Jews had been killed in the Holocaust, so it would not have been a fortunate place for him to settle. Presumably, he found a way through Yugoslavia and to Britain, as you have been told.

I hope that helps! Edit: phrasing for clarity