Answer:
I always run but never walk, I sometimes sing but cannot talk, No head on which a hat to place, You always look me in the face.
My sides are firmly laced about, Yet nothing is within; You'll think my head is strange indeed, Being nothing else but skin.
A morbidly-named body of water
Hold the tail, while I fish for you.
Hard to catch, easy to hold. Can't be seen, unless it's cold
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.