One important thing to remember is that odds like this matter less are lower levels. E.g. knight odds to complete beginners may be worth 50 elo. Knight odds to a 2200 player would be worth more like 1000 elo.
IIRC white is worth something like 50 elo for top players. So if the knight odds example is anything to go by, it's worth maybe 2 points for most players.
How much more likely is white to win than black?
There used to be "odds of a move" as in, the player thought to be weaker and given odds is allowed to play White.
How much is odds of a move in terms of Elo rating? As in, at which Elo rating difference do white and black have equal odds? When Black is rated 10 points above White? 100 points above White? Any number you could suggest?