The poem has been printed in dozens of books. You would have to refer to the text in the book you are using. You can also retrieve the whole poem on the Internet and print it out.) It is a fairly short poem and could not cover more than one or two pages. The lines would probably not be numbered because it is a short poem. You would just have to count down from the top.
Here are three metaphors:
Thou breath of autumn's being (i.e., the west wind is an actual breath)
Pestilent-stricken multitudes (i.e., the dead leaves)
Make me thy lyre, even as the forest is (i.e., the forest is called a musical instrument on which the wind plays; the speaker also wants to be a musical instrument)