Is there any source (URL) which can give me total number of coding genes in hg19 as well as mm9, I guess let us say human and mouse genomes? I could not find infor when I googled this info, perhaps I am missing something.
If you go to the UCSC Genome Browser's Table Browser tool, you can get a listing of all genes (select "knownGene" for the "table" option). You can change the genome type to "mouse" to then select mm9 under "Assembly". Alternatively, if you want to just download a pre-compiled listing for hg19, try here.