Unfortunately, no chime on the 8th gen Corolla. Look at the gauge when you first cycle the key to run. That will let you know if the bulb is out or not - as all the warning lamps will briefly flash on as part of a power one self-test.
As for how low you need to be to pop the light on, I don't usually see the low fuel lamp come on unless I get the gauge to read much lower. Light isn't an instant on - mine sort of glows a bit until the tank level drops enough to really illuminate. Fuel slosh can cause the light to not show immediately as well. My personal pet peeve is the nonlinear behavior of the gauge. Can drive 100 miles and the needle won't even move, after that, the needle will drop like a stone. The amount of fuel left in the tank can be significant. With an indicated E - I'll still have 3 gallons or so of gas left in the tank. Once the low fuel light comes on, I'll still have plenty of fuel left. Most I've every pumped in was 12.5 gallons of gas - that was driving with the low fuel light was illuminated for almost 100 miles.