It appears that the Touch Panel Controller chip is this. It is I2C plus an interrupt pin (if required) but the display panel is a 24 bit parallel connection.
It presents you with a 40 pin connector for the tft screen and a 6 pin connector for the touch panel.
If you are concerned about the number of pins, look at an SPI touch screen. The tft part usually requires 4 main signal pins. All apart from the CS (chip select) can be shared with other devices. The touch panel (if also SPI) adds just another pin for its own CS pin.