Adding features to a real estate Wordpress template

Hello, We have a real estate Wordpress website with HomeQuest template (from ThemeFuse). We'd like to add some features to the original template : On the homepage search engin : - Add a "Mandat" (similar to MLS ID) text input : the user can directly type the property's ID (it may contain numbers and letters) instead of using the others search inputs. - Add a "Type" (category) list to choose - Change "Pièces" (rooms) list into checkboxes - Add a "Mètres carrés" (square meters) sliding cursor (the same as the price) In HomeQuest template and in the "Advanced Real Estate Mortgage Calculator" plugin (widget "Calculez votre prêt immobilier") : Change the american numbers system to a french number system : - spaces instead of commas to separate thousand, millions - replace decimal point by a comma -> for example : 1,800,000.50 = 1 800 000, 50 I attached a screen capture of the final search engine wanted ([login to view URL]) and of the original one ([login to view URL]), and template files to have a look at : - [login to view URL] : files of the "Advanced Real Estate Mortgage Calculator" plugin - [login to view URL] : files of the template HomeQuest Contact me if you have any question, Thank you in advance Olivia PARNY