No, you probably wouldn’t encounter any of the missing kanji in your day-to-day life, unless they happen to fall in whatever subject area you enjoy chatting about. For example, if you’re interested by the minitutae of the Japanese emperor, then you might want to learn 璽 (= emperor’s seal) on your own.
Yeah. There’s fifty-seven kanji on the jinmeiyou list.
wkstats (scroll down the bottom)