Your Raspberry Pi came with an HDMI cable and a power cord.
Plug the HDMI cable into the Raspberry Pi’s HDMI port. Plug the other end into an available HDMI port on your TV. Turn your TV on and hit the source or input button on your TV’s remote until it matches the HDMI port you plugged your cable into.
Example: HDMI 1, HDMI 2, HDMI 3.
Plug the power adapter into a wall socket. Then plug the other end into the micro USB port on your Pi.