Those names are the General MIDI names that map to patch numbers. So Acoustic Piano is patch 0, Bright Piano is patch 1, etc. If you don't have a synth, then you will not hear any sounds. Do you own a hardware synthesiser or sound module? If not, you will need to look into a software synth. Also, check in Options > MIDI > Devices and see what devices you have listed. You should at least have the Microsoft MIDI Mapper listed. It is the synth that comes with Windows and is not very good, but it will work. Make sure it is sleclected as an output device. Then, in the track options where you see piano etc. listed, be sure it shows MIDI Mapper as the output device.