Edit Add Listing Page

Dear Friend;

please I need to remove some fields in Add Listing Page, and I try the way of adding j Query Code in custom CSS in Admin Panel, put it not work, fields are Engine, Drive, & Petrol.

also if I need to change year field from text to dropdown list, how can I do this?

and finally if I need to remove list counter from make and model selection, any idea can help me?

Thank You