@bina if you aren’t seeing the Euro character you need to ensure the character set on the printer is set to one that includes it. I tend to use cp1252 to get euro and pound symbol support. This can usually be changed in the software that the printer manufacturer supplies.
The default receipt format is:
# {location_name}
### {location_address}
### Phone: {location_telephone}
-----
## Order for {order_type}
## Order #: {order_id}
## {order_date} {order_time}
## {order_payment}
-----
{customer_name}
{telephone}
{order_address}
-----
{order_menus}
{menu_quantity}x {menu_name}
{menu_options}{menu_option_name}{/menu_options}
{menu_price}
{/order_menus}
-----
{order_totals}
### {order_total_title}: {order_total_value}{/order_totals}
-----
### {site_url}