GTa Money Issues...:D? -

Okay this is another pc concerning question but I have all that other stuff sorted. Gta 4 for pc. How do I earn money??? Can I do taxi missions because I sureloved doing those.... What about... how do I earn money..FIre fighting?? I loved the taxi ones.!!!|::::|you go to the place marked with j or a g or an s go to the light and do wath the man tells you you will get money or get some cheats by going on to cheats . com