What is the likelihood for lung cancer to be cured?

Can be high. Small size, peripheral, squamous cell can be cured. 70-90% at five years depends on cell type- small cell cancer is still a bad actor.
Stage and type. Stage 1 survival can range from 60% to as high as 90+%. Survival is individual. Depends on cancer type, treatment, and general health at time of diagnosis. Best outcomes are achieved with a multi-discipline thoracic oncology approach. These links may assist you with some general background information: http://goo.Gl/uwomy and http://goo.Gl/mo7uz and http://goo.Gl/ul4di.