They are all still understandable, though some are less common.
on the rag-- oh gosh, I haven't heard that since I was a teenager. It is a touch crass, but I think it is still used.
rain ticket-- yes, or rain check. Another I don't hear as often but we all understand it. "I'll take a rain check on that." The actual practice of a "rain check" when a store does not have the product you want is no longer common, but it was when I was a child.
squeegies- YES! A noun (for the tool used to remove water from glass surfaces) or a verb (the action of using that tool).
call roll- Yes! or "take roll" and the action itself is a roll call. Thank you for not using the common misspelling: "role." which is another word entirely.
skid row- Yup. Used for being in poverty, very bad circumstances.
pink slip (when you are fired)- I think so. Again, its recognized easily enough. I just don't know anyone who has been fired lately.
to coast (a car)- yes. Also used to "coast through life." You don't need a car to coast.
crabs (for lice)- not really. At least not in the US.
bleachers (in a stadium)- Yes. Absolutely. Athletic reporting is even called the "Bleacher report." in some places.
All the best,
Tara