I had an issue with tomato hornworms. I sprayed my plants with a BT Dipel solution. A few days after I sprayed them, I noticed a change in the plants. I did some research and found that it could be early blight. I purchased a copper spray solution and sprayed the plants with it. However, it did not make a difference. I am not sure what's going on any more. Can I save these plants? Should I keep or burn them?
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The first and the last pictures look like Tobacco Mosaic Virus (TMV). The mottling looks like it matches. The others, I'm not sure, but they could just need more of the right nutrients, and they may have a fungal infection. It may be too early to tell for sure what's wrong with those. I don't know if they also have a virus.
Alternately, it could be Tomato Yellow Leaf Curl virus (TYLCV). Although peppers can carry this virus, I don't know if they normally have symptoms.
Here are some links to pictures that led me to believe Tobacco Mosaic Virus was likely the case for the first and last pictures:
I might recommend planting resistant varieties next year. I don't know of any particular treatment for this year.
Varieties resistant to Tobacco Mosaic Virus that I recommend looking into include these:
Reason for suspecting tomato yellow leaf curl virus:
Here are some varieties reported to be resistant to Tomato Yellow Leaf Curl Virus:
