So I just tried to post this but I'm not sure if it worked because I can't see it.
I know this is a total noob question but I am new to all of this. I have a pair of chinos that need to be lengthened about an inch. Incidentally, there is about a one-inch hem inside the trouser legs. Could I simply rip out the seam and roll down the hem? Would the ends of the trouser legs look "unfinished" as a result? Again I know this is a noobie question but I'm just now maturing past my "Jeans and T-shirts" phase so this is new to me. Thanks!
Yes, that would look unfinished. You usually need about an inch of extra fabric for the hem. Can sometimes get away with less, but not much.