Several questions regarding plugin and themes

Hi, I have several questions.
I am using upfront theme.
1- I have created a sub menu, how can I make the submenu wider?
2- How can I create a page template in upfront?
3- (this is the website: How can I add a Linkedin icon beside ttwitter and facebook?
4- I need to include a contact form. How can I make them to register un the wp users table everytime a person fills the form?