Updates on website

my website is http://www.pouriaansary.com/, I need to have somebody to change the twitter feed as the one right now is sticking out and messes up the design, I had another one before but for some reason stopped working, I need a black background for the twitter feed with light text. I need for my listings to show when posting the links of the listings on Facebook like a detailed introduction, and a better metadata, furthermore I would like to be able to change the author in my blogs, currently it always generates my name "Pouria Ansary", I should be able to change this. The person who designed my wordpress created 2 separate wordpress sites, one for english one for french, this is very time consuming and inefficient, if possible I would like to be able to have them all in one place, versus having to update 2 different sites all the time. I'd like for the pictures in the international section to scroll EXACTLY like undertheromansun.com, it currently loads each picture and this makes takes away from the feel of the website. I'd like to also lighten my black transparent background just a little more Furthermore if possible I'd like to increase my SEO and also stop getting junk comments.