I've heard plenty about the vehicles, but don't have any idea what uniforms they wore. Their own production, or borrowed foreign items?

The article is actually about the equipment rather than the clothing, but it was still very interesting.

This is an official guide by the Bundeswehr, with a long section on the history of the early uniforms and some pictures, and some hilarious pictures:

https://www.bundesregierung.de/resource/blob/975292/729868/a567e2ec2a914b1eabb5f5010233da0a/uniformen-der-bundeswehr-download-bmvg-data.pdf?download=1

They used all new designs combining German uniform traditions and Western styles, but many elements are reminiscent of the earlier (Wehrmacht) uniforms. One element of the combat uniform that was not a German design was the helmet of US origin. The early camouflage pattern was a direct descendant of the "Leibermuster" pattern introduced late in WW2. At the early stages another camouflage pattern used was an altered version of the old "Splittertarn". The border protection forces (Bundesgrenzschutz) wore Splittertarn and Sumpftarn.

Ironically, the Eastern German army (NVA) and hence the army of a communist/ socialist country adopted designs that were much closer to the Wehrmacht styles, and their iconic helmet was actually a design made and tested for the Wehrmacht and would have been introduced in the Wehrmacht, had the war not ended.