Remove breadcrumb nav, and homepage content on the menu

Hi, I’m working on my website: tobaccowatch.seatca.org
And I need your help on removing the breadcrumb (Home, Join our Cause, Merchant of Death, and Tobacco Industry Supporter)

Also, the 3 topics of my homepage content (Join our Cause, Merchant of Death, and Tobacco Industry Supporter) somehow got included into my Menu bar.

Lastly, I put the code
body.blog #main-core{
display:none;
}

to remove the blogs, but the heading (Blog) still exist on my homepage, can that be remove as well?

Please help point me into the right direction.

By the way, I’m not yet using wordpress version 3.9.1

Thank you so much