The power connector should come from the power supply; all modern power supplies have a good number of SATA power connectors like this
The SATA cable is standard connector used by HDD and optical disk drives. Yes, you'd like to use SATA 6GB/s for best performance and plug into a SATA 6 GB/s port on the motherboard with a cable that supports 6GB/s. Check your motherboard manual to see which ports support 6GB/s. If the SSD package doesn't include one you can find a set of SATA 6GB/s cables for a few bucks online.