At least in the 1800s people had the skills to cope, today society would fall completely apart within hours.
I think it was less skills, than that it was the way of life, all of life, shops, utensils and tools, and supply systems, manufacturing, the food industry, transportation, communications, medicine, was geared to living in the 1800s.
If you sent a car back to the 1800s it would be useless, because there was no infrastructure to support it. In the 1800s you didn’t need to know how to build an oil lamp, or a harness for a horse, or a plow, instead you just went to the store, and the selling and caring of horses was like everything that takes care of cars today, horse feed filling stations, horse dealers and horse factories breeding new horses, horse repair shops, horse related shops making fine saddles, every household and every business designed for you to walk up with your horse and need to water and tie it up.
To suddenly be thrust into the 1800s today, means something totally different, where would people shop for a two man saw, or a horse, or a plow, or a manual coffee grinder, or coffee for that matter, since the long distance haulers no longer have the same methods of transporting goods from origin or farm, to market, that they had in the 1800s.
Today people should have enough food and the means to get water, to keep themselves going for a long time, while society would figure out work arounds to find a new way of dealing with things.