Can any MSP430 be programmed with a 4-wire JTAG?
JTAG consists of four signals (TDI/TDO/TCK/TMS) in addition to VCC/GND.

Most MSP430s also support Spy-Bi Wire, which multiplexes these four signals over two pins (SBWTDIO/SBWTCK); many of the smaller chips have only SBW.

The MSP430G2744 supports both JTAG and SBW. The programmer on the LaunchPad supports only SBW, so you should use this. (JTAG would require the expensive MSP-FET programmer, and TI's JTAG variant is not compatible with other vendors.)