Your NVIDIA Geforce 210 and your single core sempron, is the problem here.
GTA IV is heavy on CPU and you need a decent quad core to run the game at good FPS. Also, get a better video card. The GT210 isn't designed for gaming.
i have an amd sempron 145 2.8 ghz and an geforce 210 silent too but i play that game at around average 23 fps at lowest settings with many low end fixes.......and i have completed that game.............