I will like to buy an Ipad and will like to know if I can download music, movie and videos onto it?
Yes. I suggest you have a read through the user manual to give you an indication of its capabilities.
You can download a complete iPad User Guide here: http://manuals.info.apple.com/en/ipad_user_guide.pdf
Yes, you can sync music and films to the iPad. Depending on what country that you are in, this page lists what you can buy from Apple : http://support.apple.com/kb/TS3599 . You can also buy music from other sites and/or copy your own CDs via iTunes and then sync them to the iPad
Syncing with iTunes : http://support.apple.com/kb/HT1386
iPad manual http://support.apple.com/manuals/#ipad
Will I be able to download music and videos from my PC onto my ipad
