The cost to ordinary people would actually be relatively minor. You buy an electric car instead of a gasoline one. The average new car price in the US is ~$36,000. A new Nissan Leaf starts below $30,000, Model 3 only a little more than that. Replace coal with alternatives. We can do at least as well as nuclear, which is barely any more expensive than coal has been. Best case is that storage gets a lot cheaper than it is and then the price of electricity goes down from the historical norm.

Capture could cost as little as zero. Renewables inherently have to build over-capacity to compensate for intermittency, but that means there are days when they generate more power than there is demand. Use the rest for carbon capture and it's free.

The real "cost" to fixing it, and the big lobby against it, is that the oil and coal companies would take a nosedive. Literally trillions of dollars in lost revenue. It moves to alternatives. It isn't economic damage, it's displacement. But the specific people who own the oil and coal reserves stand to lose their shirts, and these are not people lacking in political influence. Everything you hear about the high cost -- it's only really a cost to them. To you it's just an upgrade to electric.

But we still have to actually do it. A carbon tax so that people do all buy electric cars and stop burning coal. It's a thing we can do but not a thing we have done yet.