Please give suggestion for tight budget not more than 14000INR or $255
Is that 14k budget after you sell your old stuff? I'd really recommend you atleast get a quad core to replace your q8400. Going i3 now, i doubt you'd see much of an improvement in apps that use more than 2 cores.
Also, the 3240 is a bit overpriced compared to the 3220. An i5 2300 or 2400 will probably be a much better option for you, if you can afford the extra cost