>> Also, do Germans seriously need to separate out green glass, clear glass, and brown glass bottles?
yes, it looks like this: https://upload.wikimedia.org/wikipedia/commons/9/93/Altglasc...
>> Do Germans need to keep 7+ bins in their homes as well, or do they just separate it out later?
Not really 7+ bins, but 4. - paper/carton - plastic/cans - residual waste (handkerchiefs/diapers/cigarette butts/sweepings) - biodegradable waste