Worked decades in chemical industry. Do I have a high risk of cancer or kidney failure?

It depends. Working in the dye industry/with napthylenes, Cyclophosphamide exposure is a clear risk factor for bladder cancer. If you are/were a smoker you have more risk of renal cancer, and working in the dye industry wouldn't help. Smoking increases risk for many cancers, including lung. It would be best to see your doctor, and let him know so he can tell you exactly what you are at risk for.
Possibly. There are many chemicals that can increase the risk of cancer. There is also an increased risk of kidney failure with exposure to certain chemicals, particularly heavy metals, and organic solvents. If these are concerns to you, you should seek a health care professional's advice.