What would cause a 91 Honda Accord with 234K to have blue white smoke when first started and how much should it cost to repair it?

Answer 1

I can't answer what the cost is to repair. But the blue-white smoke is probably oil that has run down through the valve seals while it sits overnight. With 234k (kilometers? miles?) it is not surprising at all that there might be some oil burning. No great harm done in the near future. I had this problem with an 1982 Accord and it was the valve guide seals. When they are worn oil leaks into the cylinder when the car sits and then is burned up after you start the car. I don't think the parts are expensive but unless you are pretty mechanically inclined a professional should repair it.