UPDATE [10/8 / 3PM PT]: PC players, reboot Mafia III because patch 1.01 is now available for download. This patch includes 30, 60, and unlimited frames-per-second options on PC. To select your framerate, just head to the display menu in-game. Just make sure to tailor the framerate settings to the power of your machine. This patch also includes improvements to keyboard remapping, so head to the controls menu to check out the options. Note: this patch resets keyboard mapping to default, so any changes you made to the controls previously will need to be customized after installing the patch.
Once you gain access to the mobile arms dealer, you can call them in and get any of the pre-order Family Kick-Back weapons for free. This includes the gator skinned shotgun, the camo wrapped sniper rifle and the trench gun with the drum magazine.
Once you unlock Burke and do the first mission with him, you unlock his vehicle delivery service. From there you can choose one of the three cars from the Family Kick-Back content. The Lassiter Leopard, a Smith Moray MX100 or my personal favorite, the Berkley Stallion.