Magento 1.9.2 – store view in multiple domain

I have a unique website with two store views for two languages โ€‹โ€‹(Italian and English). For store view of the first language I would like to keep it in the address www.mysite.it while the second one I want to call it from external domain with the address www.mysite.com.

My question is: To recall the second store view from the external domain (www.mysite.com), is it sufficient to modify the index.php file in the root of the site or do we also need to modify the .htaccess file?

Thanks

Magento 1.9.2. – Change format of summary in cart page

I would like to change the format of the totals in the summary on the shopping cart page, on the checkout page and also in the email for new order, on the customer’s orders list, etc.

At the moment Magento offers this standard format to report the totals:

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I would like to change the coin symbol position and insert him before the number and instead of the comma insert the point, like this:

enter image description here

How can I do?

Can I modify it in such a way that it applies in every situation every time it shows the numerical values โ€‹โ€‹of the order summary?