which one of the sport betting agencys have the option to bet on the winner of the toss before a sporting event?

I don't know, but who cares? Surely you don't want to bet on a lottery like that?

its easier to pick a winner, in a 2 horse race,,
theres a 50/50 chance....

I am pretty sure I saw that option available at Centrebet.

Betting on the coin toss. Whats next two coins? Betting odds or evens.

Well, you can actually bet on whether the combined total of the two teams' scores is odd or even. What next?

if its paying 1.90 or higher each way...., in a 2 horse race., then ill have go ....
if you lose on the first bet.,,, put more money in the next bet,...
not hard to pick a winner out of picking heads or tails.....
one of the easiest way of making a profit from betting

$1.95 @ Centrebet