Answer:
What force and strength cannot get through. I, with a gentle touch, can do. Many in the street would stand. Were I not a friend at hand.
What always runs but never walks, often murmurs, never talks, has a bed but never sleeps, has a mouth but never eats?
My first is nothing but a name; my second is more small; my whole is of so little fame it has no name at all.
A mighty weapon in the war against winged household pests.
What can burn the eyes, sting the mouth, yet be consumed?
If it’s information you seek, come and see me. If it’s pairs of letters you need, I have consecutively three. What am I?