Small Magento tasks

Its about the website www.lillesko.dk. As everyone can see its a redirect from the start and that's not a optimal solution. Therefore I need the site to be moved from the folder (Magento) to the root. I just don't have the knowledge to know whether I'm missing something. Secondly there is a newsletter button which is not working. When you write an email and press Enter you will be signed up for the newsletter but if you press the button you get an error. This need to be fixed. Lastly I need a direction to where I change the informations that the customers write in the purchase formular. I have no idea where to change that. This is so to speak a guidance I'm looking for. If anyone could help me with this I will be very happy. Please let me know needed informations from me. Best regards Mads