Clean our code and add more features

We have this website [login to view URL] into pure php code and we need to clean the code as it was written by BAD INDIAN Developer and need to integrate full admin panel to make the admin edit any part in the website , we also need to include more features on it.. We need also to include blog for this website.. There are few functionalities not working till now as ( user profile - paid webinars ) our website contain registration free and after login you can attend ( free and paid ) webinars with different instructors the main missing parts are 1 ) free and premium accounts ( admin should can cancel premium account and make all free registration ) 2 ) free and premium webinars 3 ) blog 4 ) User profile and I need to make this website always ACTIVE and need to make users active with each others see you can suggest what can we do to make our website get users and customer with traffic for Forex peoples Can now take a look there [login to view URL] and see the features in this website and if we can to make our website more effective with adding chat as he added or we make users add articles with rank for the best chart or author you feel that this website as Forex social media Please this is one of the required tasks from our company as we will need more after this relationship..