No.
yes if you eat them
Wouldn't that depend on the type of toilet valve and where the leak is coming from that would dictate the type of repair?
Yes.` The wax ring may not have been thick enough or making complete contact and the toilet not held down tight enough. Every time the toilet rocks just a bit and water gets between the wax and the toilet. It doesn't reseal and keeps doing this until it has a leak to the outside edge of the seal. Just another wax ring, a thicker one and bolt the toilet back down tight, but not too tight and break the toilet.
The wax ring is just to seal the toilet to the drain. It has no effect on the flushing.
Check for a leak at the wax ring of the toilet. This leak will migrate out, on the surface or under the surface of the floor. Check for a leak in the wall in the back of the vanity (the vanity may have to be removed). A slow leak in a wall is likely to be the DWV system, not water.
There's a leak in the pipe.
Dye testing
The two common causes for a toilet tank hose leak are the threads and the hose itself. Turn the water off, unscrew the hose, and wrap the threads with Teflon tape available at any hardware store. Reconnect the hose and turn the water back on. It it still leaks, consider replacing the hose as it may have a hole in it.
It can stink if it is not flushed or it is dirty. In some cases, there could be a leak at the base, and the standing water around the toilet has an odor.
It is your toilet that caused the damage and therefore your responsibility.
usally a line stoppage
Either termper the water or fix the leak causing the sweating