You can't get a gaming PC for just 22k. Either increase your budget or forget about gaming.
Anyways,
Athlon64 3000+ Rs. 3100
MSI RS-482 Rs. 3200
1 GB DDR400 RAM Rs. 2300
Seagate 80 GB SATA2 HDD Rs. 2200
Liteon DVD writer Rs. 2000
Logitech kbd+mouse Rs. 700
Samsung 17" CRT Rs. 4800
Creative 2.1 SBS370 speakers Rs. 1200
Cabinet+400W PS Rs. 1500
Total Rs. 21,000
It's more than enough for office work but you will only be able to play games at very low resolutions without any effects enabled.
You can add 512 MB RAM and a graphics card at a later date to run all games properly.