I bought forza Horizon 1 as a pre-paid code at the Korea cdkey shop.

get a pre paid code from places like cdkeys for your region, its safer than adding a payment option.

Makes no sense in shops selling xbox pre paid codes if you still need credit card registered.

Buy a 12 month pre-paid subscription card from a game store, a lot cheaper than the online price direct with Microsoft or from CDKeys like I do.

12 Month Xbox Live Gold Membership | Xbox One/Xbox 360 | CDKeys

You don`t get a code if you pay direct to MS, you get automatically enrolled into XBL Gold.

You only get a code if you buy a pre-paid subscription card.

And as stated above, CDKeys is the place to go for Gold subscriptions, far cheaper than anywhere else.

If you are referring to the Dodge Challenger SRT8 392 with the Forza Horizons livery on it. The code is only available through certain retailers when you pre-order. They are Amazon.com and Best Buy. The will only be available on Forza Motorsport 4 not Horizon.