wordpress template with Json data and car data.

i have an existing wordpress website, working. - i need a modification in the theme. (can be supplied on request) I need a call me back button that sends name, phone and optionally email address and car id to an email address. -i need a widget area in the right on the car detail page. -I need a phone number to appear from a list of phone numbers in the car detail page. (i have a table with phone nos. phone no x--> phone no y etc) so if the car details have phone no. x then it should replace x with phone number y . then last function is a rating system that shows stars. the rating system will be filled from backend and is related to the phone no of the dealer. so if the phone no. is phone no. x then show rating and comments of that dealer (linking id = phone no). table phone no x, (as id) name of person that gave rating, no of stars, comment, date