php errors and duplicate calls

there seems to be some errors in the theme, this is what devtools detects on the home page:
Notice WC_Cart::get_cart_url is deprecated since version 2.5! Use wc_get_cart_url instead. 1
+ Toggle button
wp-includes/functions.php:3853
Plugin: woocommerce
Notice Undefined index: format 1
+ Toggle button
wp-content/themes/arcane/addons/tournaments/extended_functions.php:3206
Plugin: js_composer
Notice Undefined index: format 1
+ Toggle button
wp-content/themes/arcane/addons/tournaments/extended_functions.php:3211
Plugin: js_composer
Notice Undefined index: format 1
+ Toggle button
wp-content/themes/arcane/addons/tournaments/extended_functions.php:3213
Plugin: js_composer
Notice Undefined index: format 1
+ Toggle button
wp-content/themes/arcane/addons/tournaments/extended_functions.php:3215
Plugin: js_composer
Notice Undefined index: format 1
+ Toggle button
wp-content/themes/arcane/addons/tournaments/extended_functions.php:3217
Plugin: js_composer
Notice Undefined index: format 1
+ Toggle button
wp-content/themes/arcane/addons/tournaments/extended_functions.php:3220
Plugin: js_composer