No registration need

Hi,

There is no option in order to let the user decide what to do. That's something we want to add in the future.

When you set that "registration" option to "no registration", it removes the username/name/password fields of the registration form and no user is added to joomla. That's the goal of that option. It still asks for the email address and the address of the user. If you want to change the address fields of that form, you can configure them via the menu Display->Custom fields.
And if you don't want that login or registration view, you can remove it from the "checkout workflow" option of the configuration. However, that means that, from a hikashop's point of view, you won't know who ordered your products.

Hi,

You can approach that but you won't be able to display several add to cart buttons with different prices for the same product unless you modify the dipslay of the corresponding view in HikaShop (that requires to know PHP).
You will have to have several products for that, or you will have to direct the user to a product page where he will be able to choose the characteristic of the product.

Ah you want to change the text ?

That's not a problem. You can do that with translation overrides, as explained there:
www.hikashop.com/en/download/languages.html#modify

Yes, why not.

But you can override it in the translation area as explained there:
www.hikashop.com/en/download/languages.html#modify

It's an override, so you won't loose the original.