When I try to leave a comment, after clicking submit it comes up as a 404 error.
Your URLs are still set incorrectly in Options/General. Both should be:
If you cannot get to Options/General (due to the fore-mentioned 404 error), you will have manually edit the database values via phpmyadmin. See: http://codex.wordpress.org/Changing_The_Site_URL#Changing_the_URL
Then, when I try to go to the admin control panel, it shows up weird.
Either empty your browser's cache, quit your browser, then relaunch your browser, or hit F5 while viewing the admin page.
When I click on [an Administration] link it shows up as a 404 error.
See the answer to your first question.