To hide date in blogs, insert in custom CSS in every blog where date should be hidden:

http://answers.squarespace.com/questions/6638/hiding-blog-author-date-using-css-header

.collection-type-blog article .date {
    display: none; } .author {display: none;}

To remove underlines decorations in footer:

http://answers.squarespace.com/questions/50371/marquee-can-you-remove-the-underlined-links-from-the-footer

.footer-wrapper a, 
.footer-wrapper a:visited {
text-decoration: none;
}