@NitinSawant Gave you a good starting link. While some will tell you to buy a Mac, I, for one, understand the financial issues with that. Before I bought my first Mac, I was running OSx on a Dell laptop (yes, not a Mac machine). It worked just fine, the only thing I had to do was hunt down the wireless driver for my Intel Wireless, but that was about it.
You will need to hunt around for the appropriate 10.4.X version of the software. I believe I found a version of 10.4.6 in iso form that I used. Once you have that image and can burn it to disc, you should be able to install it pretty easily (IMHO).
Regards,