I am new to arduino boards. I would like to make my own arduino board using atmega 328 and im following the tutorial given on the website -http://arduino.cc/en/Main/Standalone . I do not have an existing arduino board so, i would like to know how can i bootload my atmega 328 with arduino bootloader without arduino board, just by using my computer.
You can buy a 328 with Uno bootloader pre-installed from many sources.
Yes, you either need an AVR ISP Programmer, or a bootloaded 328P that you can run a sketch on to install a bootloader onto another chip.
Bootloaded part is less than blank part?
Best sketch for bootloading other parts