what five-letter word that becomes shorter when you add two words to it

what starts with 'e' but has only one letter in it

What is in the middle of toronto

You see me once in June, twice in November but never in may

Two in corner, one in room and zero in house what am I ?

what 4 letter word can be read forward, backward, upright and upside down( in caps lock )

forward i am heavy but backwards I am not

what five letter word is one when two words are taken from it

I have three letters but add two more I become fewer what am I

what is the end of everything ?