How do I add picture to my front page

Are you referring to the lock screen or the home screen? You would need to go to Settings>Wallpaper, then Choose a New Wallpaper, select the photo you wish to use, then choose if you wish to use it on the lock screen, the first one you see, or the home screen, which is what you see with your app icons on it, or both.

It seems we are experiencing a difficulty in understanding. I just explained what you needed to do and you marked the question as solved. Now you are asking the same question again.

You need to try and clearly explain what it is that you are trying to do and what happens when you try. Also please indicate what you are identifying as your front page. Try referring to my descriptions in my original response, and we can see where we can go from there.