Recent expeditions to Mars has turned up evidence that there was at one time running water on planet Mars. Other rover expeditions to mars have found fossil evidence of microscopic biological life. So, although there likely was never so-called intelligent life on Mars, the scientific evidence suggests microbial life did exist on Mars at one time.
No, there has not been organic life on Mars as no evidence to support such a supposition has been found to date. The Mars rover and CURIOSITY has found no evidence of life, though they have found evidence of water. Still, water alone is not enough to support organic life.