If you want all your images within your blog posts to have padding you could try targeting the images within the posts.
As default (I think) the posts are contained with the div class “storycontent” so you could try:
.storycontent img {padding: 0px 0px 0px 0px;}
Just add the padding you want.
I think what you need is under:
Options> Reading
Look down and there is something called Blog Pages and you can enter an amount of post you want per page.
I hope this helps.
