//OVERALL SCORE CALCULATION
$display_id = 'default';
$foo = '';
$view = views_get_view('foobar');
$view->set_display($default_id);
$view->set_arguments(array($foo));

//replace name_of_filter with your filter machine name
$view->set_display($display_id);
$filter = $view->get_item($display_id, 'filter', 'name_of_filter');
$filter['value']['value'] = $filter_value;
$view->set_item($display_id, 'filter', 'name_of_filter', $filter);

//use this to count the results of your view
$results_count = count($view->result);
//print the rendered version of your view
print $view->render();

//OVERALL SCORE CALCULATION
$view = views_get_view('foobar');
$view->set_display('default');
$view->set_arguments(array($foo));
$view->render();

/*
 * $view = is an array of your view's data
 */

//use this to count the results of your view
$results_count = count($view->result);
//print the rendered version of your view
print $view->render();

Drupal Views 2 & 3 Programmatically Render View with Arguments

drupal, 3

PHP