In the first two pictures, it just looks like the oldest leaves are showing their age. Quite normal.

In the remaining pictures I can see some modest bug damage. But nothing much to worry about IMO.

If you're concerned about the white/silver patterns radiating from the major leaf veins, this too is completely normal.

Your vines' overall condition is not optimal. Not very bad, but not very good either. There should be multiple vigorous vines growing from each plant's base. But as it stands you should still get some reasonable pumpkins.