The new Apple laptops come equipped with only Thunderbolt 3 (USB-C) ports, I suspect the whole industry will standardise on USB-C pretty soon but at the moment there is obviously the need to support legacy peripherals. Fortunately Apple have put together a page describing most of the adaptors that might be needed. This includes standard USB, HDMI, VGA and Lightening cables. Remember up to six devices can be daisy-chained to each Thunderbolt 3 port of the MacBook Pro; and the Thunderbolt 3 (USB-C) to Thunderbolt 2 adapter doesn't count as a device against that limit.

Also note.

MacBook Pro (15-inch, Late 2016) delivers full Thunderbolt 3 performance on all four ports.

MacBook Pro (13-inch, Late 2016, Four Thunderbolt 3 Ports) supports Thunderbolt 3 at full performance using the two left-hand ports. The two right-hand ports deliver Thunderbolt 3 functionality, but have reduced PCI Express bandwidth.

MacBook Pro (13-inch, Late 2016, Two Thunderbolt 3 Ports) delivers full Thunderbolt 3 performance on both ports.