ValeDeOro

You can set up different shipping zones with different pricings. This would allow you to set up a Shipping zone for all of the US and then a separate one for Alaska. To find more about how to use Shipping zones, please check the documentation here: https://docs.woocommerce.com/document/setting-up-shipping-zones/

The sidebar is governed by the theme you are using. You might also want to look into special plugins that allow you to add the brand as a separate attribute and call it via a dedicated widget. If you google for “WooCommerce Brands”, you’ll find a couple of options.

You can also get in touch with the theme authors of the Gem Theme and ask for more information on the template they are using for the shop page.

Coupons do not count as a gateway in its own right, but you can set BACS (bank transfer) as the payment gateway to avoid e-payment. If every customer puts in the necessary coupon amount, they won’t get the bank transfer information.

To find out more about coupons and how to manage those, have a look at the documentation here: https://docs.woocommerce.com/document/coupon-management/

This sounds very much like a custom solution, especially regarding the product/vendor availability based on the customer location. As a starting point, you can have a look at WooCommerce Product Vendors or similar plugins (search for “WooCommerce Vendors” or “WooCommerce Wholesale” on google to find more options). Depending on the plugin chosen, you can then combine it with WooCommerce Bookings or something similar and customize from there.

Yes, a rollback from 3.0.8 to 3.0.7 is safe, there were no DB changes. By now you might want to also test the latest WooCommerce version since there have been a few updates.

You might want to look into the Measurement Price Calculator, which allows you to sell objects per unit.

Another option is WooCommerce Unit of Measure. If you search for “Measurement Price Calculator” you might find even more options.

You’ll want to adjust the capabilities of your store manager. To find out more about how roles and capabilities work, click here: https://codex.www.ads-software.com/Roles_and_Capabilities

And this plugin can be helpful to manage your roles and capabilities: https://www.ads-software.com/plugins/user-roles-and-capabilities/

Yes, you can use WooCommerce as a catalogue. There are a couple of plugins that can deactivate the shop / product / price options for you:

WooCommerce Catalog Mode
YITH WooCommerce Catalog Mode
Catalog Visibility Option

This snippet might help: https://www.sutanaryan.com/2014/06/how-to-remove-product-quantity-selectors-woocommerce/

Or you could use the Woo Remove Qty selector

Make sure to test on a staging site first though, since the plugin hasn’t been updated in quite a while.

If some products have the correct URL slug, then your permalinks are most likely set up correctly (though it doesn’t hurt to check).

If all weird slugs are from products that were imported from Weebly, then yes, that might well be the problem. Can you check the slug of your product that’s carrot cake, for example:

Regarding SEO, if you just imported those products in the last months it doesn’t make a huge difference if you change them now, since they don’t have a lot of history yet.

Yes, you can do that with a bit of customization. This tutorial explains how to use a code snippet to change the display: https://calebburks.com/modify-variable-product-prices-in-woocommerce/

You can add the snippet to your child theme’s functions.php file or use a plugin like Code Snippets if you do not want to change the functions.php directly.

The sidebar depends on the theme that you are using. If you check your shop page, do you have the option to choose a “default width” template, like this:

If this is not the case, you’ll have to create the template yourself or get in touch with the plugin author.

Some things you can check for:
Is the right shipping zone being used? Is the flat rate set up correctly? Did you enter any additional charges (e.g. handling charges) that might interfere? For a step-by-step guide about flat rate, please check this guide: https://docs.woocommerce.com/document/flat-rate-shipping/

Are you using a specific plugin for those coupon codes? By default, WooCommerce coupons allow for either a percentage or a fixed amount, not both.

You can find out more about coupon management here: https://docs.woocommerce.com/document/coupon-management/

To restrict the usage per customer, you can limit the usage per coupon per user, or per number of items.

Thank you for the status report! It shows that your cart and your checkout are missing the shortcodes necessary to show WooCommerce content. You can find more about this here: https://docs.woocommerce.com/document/woocommerce-shortcodes/#section-1
Please make sure to add [woocommerce_cart] to your cart page and [woocommerce_checkout] to your checkout page.

If you want to create a multilingual website, Loco Translate is not the right plugin for you. Loco can help you to translate, but it does not manage different versions of the website. You want to look at WPML, Multilingual Press or Polylang (to name just a view) instead.