Home page sidebar

Hello,
Please provide solutions for the below things and please help me with step by step.

1. Unable to setup homepage, currently i am using blog sidebar for a while but actually I need home sidebar which is not working in theme,
I have also tried by adding widget to the home sidebar but its not showing up home sidebar.

2. Slider is not working.

3. In Post there is blank place shown for image, I need to deactivate this option for a while as currently there are no images in any of my posts.

4.How to change the size of the fonts for pages and posts?

5. Unable to change the blog style.

6. How to add breadcrumbs?