The simple answer is that during the lifecycle of the frog it eats a large amount of insects and their larvae. This includes mosquitos, flies and so on. So, with fewer or no frogs, insect numbers would increase astronomically.
If frogs disappeared (and there is a current issue with that exact thing happening), then it would be a notice that something is wrong ecologically.
Nothing
No, you would have to put a frog on your face to have that happen.
you will get very sick, but, depending on the frog, u could die!
Depends on the species. which one would you be talking about?
species
It may try to bite.
it's gonna be WET !!
they don't
This would depend on the species of frog and snake. For example, a common frog and garter snake would probably have the serpent win, while an American bullfrog could easily eat the garter.
The frog in general, no. There are several frog species that are endangered, however.
There wouldn't be anymore golden frogs.
Probably not, because then they would poison themselves, unless different species piosoned each other.