I think the \"$100,000\" font you\'re thinking of is Impact.
They used a couple of fonts for the \"$100,000\" display. Impact was the first or second season for that and early Instant Bargains...IIRC, that font was also used to display how much was being offered on Wheel.
They\'re were also a few variations of Helvetica (Black), which seemed to be the standard NBC font. There were the \"rhinestones\" (late-1984 to the end of the run), and before that, a plain solid yellow \"$100,000\" (another NBC game staple in the 80s), then yet another plain yellow one, but with two horizontal lines above and below the dollar figure.
/Was never a big fan of Impact
//Looked too.....gaudy