Can I use this camcorder as a medium to show my PC movies on its LCD screen via DV-input then connect the AV cable to transfer the video from the camcorder to the TV screen via AV output in the Camcorder

And if not what is the method to transfer the show the pc videos on TV screen using the camcorder (without VGA card including tv-out jack)

I'm confused, why is the camcorder preferred over a video card with S-Video Out? Does the TV not have PC input?

Simply i have no vga card with tv-out jack and in the same time i want to show my pc movies on TV screen so, can i use the camcorder to get movies on tv screen

I think the only way that might work is that if your movies were played within an editing program and even then it won't be ideal. A video card is going to be the preferred way and will save wear-n-tear on your camcorder.