Customize some simple details in the Joomla component

in advance I have to say I do not speak English well and I use google translate, I hope is not a problem. Customize some simple details in the component "estate agent improved" view demo (url component>> [login to view URL]) 01 - Custom Search module, add dropdown to search by country. Note: The demo of this component shows this country dropdown, but when I install the component and module on my localhost test server shows no country dropdown. (Url test>> [login to view URL]) see attached image>> "[login to view URL]" 02 - I also need to search by price and the price list changes depending on the type selected, rental or sale. would add a new price list in backend. see image "[login to view URL]" see demo>> [login to view URL] 03 - Add new extra fields in the form of property see image "[login to view URL]"