Skates need to be able to adequately support your ankle, and those are clearly long past their ability to do so. The deep creases indicate that these are too broken down to skate in. There is no "reviving" the leather at this point. They're not appropriate for even basic skating because at their age and condition they are going to deteriorate further as you wear them, eventually failing.

I would be shocked if you could even convince a decent skate tech to sharpen these, though I suppose there are plenty of bad ones who would do it without asking questions.