recently my family bought this.I workout my full body to gain muscle.First can someone like this machine obtain muscles on legs?Second,how much time and how many days should a thin guy do it.Third question should it be "normal mode" ,"soft" ,"hard"(I mean the difficult of doing it .What is more helpful of those to obtain muscles on legs.I avoid to refer the mark for no advertisements reasons.
Your photo appears to show an Elliptical machine for aerobic/cardiac conditioning. These types of machines don't typically provide enough resistance to stimulate hypertrophy. Gaining muscle, specifically over your entire body, requires resistance training, sound nutrition, and rest. You should look to supplement this machine with a strength training program geared towards your particular goals. Either by going to a gym, or, performing body weight movements at home.
As far as the settings on the machine are concerned, that's something you'll need to decide based on your goals and your current ability. Exercise machines usually have an owner's manual explaining their usage. Consulting the manual should provide a starting point for you to decide on the settings. Use your individual fitness goal as a decider on how often to use the machine.