Hello,
you should enable search form in your listing type: Listings > Listing Types > your type > Edit > Search Settings > Search form > Search form on the Home page
then go to Forms > Search Forms > build quick form for your type
or you can hide this box at all via ftp > your_site_derictory > templates > your_template > tpl > blocks > home_content.tpl
change:
Code:
Only registered members can view the code.
to:
Code:
Only registered members can view the code.
or just remove it
but it will be just empty space because it is used for sidebar search form in this template