Hi Mary,
Your peace
lily looks like it is in pretty good shape. It is a Spathiphyllum 'Sensation.'
The lower leaves are a little droopy because it was allowed to get a bit wilted a few times and because of age. (Don't we all sag a bit with age?!)No reason to remove them until they start to yellow.
The discolored leaf in the second photo can be trimmed off at the base.
The damaged leaf on the right can be salvaged by trimming in such a way that the original contour of the leaf is restored. That leaf was damaged physically but it is healthy.
The pot size and soil, are fine. There is no reason to disturb the roots on an otherwise healthy
plant. If you don't like the looks of the pot it's in, then put the pot and
plant inside of a planter more to your liking.
Keep it near a north window. Fertilize it at half strength every month or two. Water it just before it is ready to wilt.
The 'Sensation' is one of the hardier varieties of peace
lily and often their
flowers have an unusually sweet odor - something to look forward to!