Do modifications in an existing Joomla website

So this is my website : [login to view URL] Here is the list of the modifications I would like you to do for me : 1. Center the logo in the slideshow. 2. Give me the possibility to have a different logo in the menu. It would need to be centered within the menu and stay centered in the menu, no matter where you are on the website - scrolling down or not. (the logo is dissapearing when you are scrolling down and reappear when you stop scrolling. This is annoying and I would like it fixed). 3. On the 2 logos, when people click on them, direct them to the anchor : #accueil 4. I need to change the anchor is each section. Just tell me where to change them and I should be able to do it myself. Example : #home will become #accueil. 5. In all carrousel, the slider keeps on changing even if there is only one image. When there is only one image, I would need the slider to stop changing and also, to retrieve the bar that (when you have more than one image) give you the possibility to change from on image to another one. 6. Retrieve the Google map section. 7. In the princing plan (rename forfaits), retrieve the call to action button for all 4 pricing plan. I don't need them. 8. Reduce the height of the slider at the top of the website. I would like, on a 1366x768 screen, to be able to see the menu at the bottom of the screen. 9. When I use the contact form and send an email, the confirmation text show on the title of the page and bring you back to the top of the page. This is not very interesting for a visitor who doesn't know if the message is sent or not... Let me know how much and in how many time. Thanks and looking forward working with one of you !