Hello people
So, just to prove that people who don't know what they are doing, shouldn't play around with code, I have totally broken my blog.
I am going to do a full re-install but first I was hoping someone could help me find the posts I had already made.
I would really like some advice about what I can rescue in terms of my posts that I wrote, I don't know what file they are called or where they are written to once I make them in WP
Thank you for the help!

You had a database, right? Unless you dumped it, the posts should still be in there, and if you enter the correct database name, username and password in the wp-config.php file again after you reinstall WP, the posts should be found.

I know this is true because I had 3 different instances of WP running, with different themes, all pointing to the same database, and the same posts were showing up in each of the WP installations.