Help me please & how can I do this?

At first thanks for the community. without help I couldn’t. This time need another help.

  1. please see those image 1st image themeforest preview link but within a some second automatically change this link see 2nd image. how can i do this?

  1. how can i remove themeforest default & add this type of top header, responsive option & my all theme. see these image.

Please help me . Thank you!

_Regards, _