Hey,
1) The slider shows featured images of posts. Click on "Upload" => Pick image => Use as featured image" on the post/page editor page. You need to set featured image for all posts which will display in the slider. You can change the slider category in the wp admin panel ( Newscast Options > Mainpage Options).
2) In style.css you'll find following code:
#top .logo, #top .logo a{
display:block;
height:70px;
width:250px;
position:absolute;
left:20px;
top:13px;
border: none;
padding: 0;
margin:0;
z-index: 10;
}
#top .logo a{
top:23px;
left:0;
outline:none;
border: none;
}
Adjust the width, height, top and left values to change the logo size & position. If that's all you don't need to hire me :)