Magento beginner

Hi, I have a few questions about the program. I would be really grateful if someone could help me with a few questions:
-How many base currencies are possible to choose and set up?
-If we do not define any condition while setting coupons what will happen to defined discount?
-Deleting the categories will items be deleted as well?
-Besides from UPS, DHL and Free shipping, are there other delivery methods?
-Deleting a set deletes all his attributes from the list?
-A maximum number of promotions for every product?
-Changes on the home page can be made within which section?
-Is it possible to restrict access to online translation?

submitted by /u/LiberumAnimum
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