My other question was how was the elimination round done on Password All-Stars and the later Password '75 Shows?
I assume by \"elimination round\" you mean the part on the lower level which determined who got to play the main game. And if you don't know, I'm assuming you've never seen it, so you may not even know it was on a lower level!
Anyway, the Password '75 part is easier to describe. The two celebrities were on the left and a panel of four contestants were on the right. Celebrities took turns giving clues to a password, and if a contestant thought she knew, she buzzed in. If she was right, she got a point. If she was wrong, she was out for the rest of the clues it took to guess that word. (In other words, you only got one shot per word.) Two points earned the right to go upstairs to the main game, and the first two to do that were the players. For the other two, it was The Land Of Parting Gifts.
The Password All-Stars format (which obviously came first) was played the same way, but rather than being dismissed, the two celebrities on the panel who failed became the clue givers for the next \"elimination round\". The four celebrities who ended up playing the main game became the panel for the next elimination round. That rotation continued for four days, and the four highest scorers played only main games on Friday to determine a champion.
I may be off on some nuances. For example, although no regular \"All-Stars\" episodes exist in circulation, I believe that on All-Stars, it took three correct answers in the elimination round to qualify for the main game. I'm also thinking that for the later contestant shows, there might have been a brief period when a contestant wasn't sent packing until after two losses. Not sure, though.