Obviously you are missing the complete AmigaOS system includes. These have to be installed seperately and *before* VBCC is installed. During installation of VBCC's 68k target you are asked where the system include files are.
For example you can get the navive development kit (NDK) of OS 3.9 from
http://www.haage-partner.de/download/AmigaOS/If you unpack it to Work: the needed include files are in Work:NDK_3.9/include/include_h
Now that you already have installed VBCC, check your s:user-startup file. There should be a section which after correction of the include path should look like this:
;BEGIN vbcc-m68k-amigaos
assign >NIL: vincludeos3: vbcc:targets/m68k-amigaos/include
assign >NIL: vincludeos3: Work:NDK_3.9/Include/include_h add
assign >NIL: vlibos3: vbcc:targets/m68k-amigaos/lib
;END vbcc-m68k-amigaos
Bye,
Thomas