How i may add some items on my Header, body, Footer,

Hey, Highend WP Theme Support
Nice to meet you for the first time, my name is Hafiz Suliman, this name is my business name and my URl website.{http://www.hafizsuliman.com}
I have been more pleasure to contact you because i need your assistance. first your Highend Theme is amazing and I’m really happy to found it, but i have some questions need your assistance to let me complete my website and published.
I have three questions i hope you to answer all.
I need video presentation or any guide tell me how i may do?
1 / add image or text or anything on header page
2 / How i may use visual composer, i know how i use traditional WP edit title, and edit article, then publish, but visual composer has a deterrent technique.
3 / How may add more items on footer page, contact, connect, Newsletter subscribe and more.

Thanks a lot
Hafiz Suliman
sign2.hafiz@gmail.com