blue smoke

Hi people. I left the car for 3 minutes on a average gradient slope, with the gear in P handbrake in, engine on. I went inside a friend house. After I went back to the car I got scared how much blue smoke was coming out from the exhaust pipe. I have the car for about 10 days. How it's possible...

3 litre 1988 model 109,000 miles just failed it's MoT due to blue smoke on acceleration. Is there an interim solution to get me through the MoT, like Forte engine oil additive? I understand that my valve stems may need replacing, and the valve guides. However I'd prefer to do the job in a...