Can I use prepaid codes to buy a console?

Currency from your account can only be used to purchase digital items.

You can use a credit card to buy things from the marketplace. You can also purchase prepaid cards from local retailers and redeem them on your console or computer. Follow the steps in this link for help

support.xbox.com/.../redeem-prepaid-codes

I don't know (don't remember) if prepaid credit can e used to buy Xbox Live Gold or Xbox Game Pass Ultimate subscriptions, but, you can work around this issue buying a prepaid for code for one of this subscription to gift with the console.

Depends

First did you buy it with a creditcard on the console or did you purchase it with a prepaid code

If you purchased it with a prepaid code you are ineligible as it requires you to buy the subscription

The prepaid code counts as a previous purchase and a post prepaid subscription not a renewable one

If you did use a creditcard and bought it on the console them you need to wait the 6-8weekd after the promotions end for the code to be sent to yoh

Depends

Did you buy it on the dashboard or use a prepaid code?

If you used a prepaid code then no as that counts as a previous purchase

If you bought itnon the console then yes butnusually takes 6-8weeks