hsaf1 on "a few questions for adjusting the appearance of our site"

Hi, I am new to wordpress and am in the middle of making a new site, I have a few questions for things to sort on our site since changing the theme to a premium one from the free one.

All our pages display a post icon, posted by, date, and no Idea, how do i go about removing these?

I can make featured sliders for the main page but dont seem to be able to put them up. i have another slider plugin but the one that comes with the theme looks to be better.

Is there a way to change the menu color?

Is there a way to remove the loading screen before the page opens?

The site is http://hancockstovesandflues.com/

Thanks in advance!