Minor changes to website (PHP, CSS3, HTML5)

My website is on HTML5, CSS3 and coded in PHP. I want following changes done. 1) My website has Forum functionality already there. I want following changes done to it. - Text Edit Tools (bold, underline, italic, strikeout, align left, align centre, bullet list, numbered list, Font size, text colour, background colour, Add Link, Add Image (Upload), Add Video (Embed or Upload) etc....) for both Posts and Comments - If URL is part of the Post or Comment, it should automatically turn it to a clickable URL - Smileys pack to made available for posts and comments (to choose smileys/emoticons) - Avatars pack to be made available during user registration or at Edit Profile page (there is already an option to upload a photo, which will stay) 2) Apart from the Forum functionality, Downloadable items are not correctly laid out currently. Text cells should be dynamic so that heights automatically get adjusted according to the size of the texts in it. Also width needs to be adjusted. 3) I have digital downloads on website. And each download has maximum attempts. Unfortunately currently it is coded for attempt counter. Instead of attempts the counter should increment when download is successful. 4) From Admin Panel, I'm not able to upload large files. (I think it only uploads up to around 60-70MB. Server is configured for 2GB uploads so no server restrictions.) 5) Website pages are not responsive on mobile, smart devices, tabs and pads. So pages need to be made responsive.