Ugh... Blogger

The template on our blogger got messed up a while back and I can't figure out how to get the blogger template off and just have the cutest blog on the block background. It is like it meshes all these things together now and I can't figure out how to get the old stuff off. Also, when I upload images the code only pops up (in words) on blogger so I can't see the pics on the blog till I publish or preview them after uploading. I get tired of messing with it so if any of you know what we did and how to change that.. I welcome your advice:)