In order to enable Wifi and Bluetooth on the new Raspberry Pi 3, supported by the latest Minibian release, you have to install some stuffs not installed by default because unneeded by the previous Rpi boards.
So you just have to:

apt-get update
apt-get install firmware-brcm80211 pi-bluetooth wpasupplicant

After this, just reboot and you will have Wifi and Bluetooth enabled.
In order to configure your Wifi network you can then follow my dedicated “Wifi HowTo