Post titles as links on index, adding ‘edit’ link

Hello!

I run a fansite at https://www.stillnsync.com and we had our template created for us but any changes we want, we have to do ourselves. I’d like to accomplish three things:

As you can see on our index page, the post titles do not link to individual post. I’m not sure why this template was created this way, but it’s bothersome, now that I’ve been working with it for six months. You can’t get to a single post unless you click on ‘comment’. It would be more useful to us to have each post title link to the single post.

In another thread along the same lines, I found this code:
<h2>” rel=”bookmark” title=”Permanent Link to <?php the_title_attribute(); ?>”><?php the_title(); ?></h2>

This is the code that is in our template:
<div class=wrapper><div class=maintitle><i><?php the_title(); ?></i></div><div class=subtitle>

Would I simply replace all of the current code with the new code?

I assume, then that this would rid us of the italics in the title?

Lastly, If I want to add an ‘edit’ link, would I add that in index.php, or just in post.php and page.php?

I’ve looked through the wordpress template tutorials but I’m always afraid of screwing something up. Many thanks in advance for clarification.