Flash is not supported on the iPad - and as Adobe have never managed to make a version of their flash player that works on iOS devices, and they have recently announced that they are stopping development on all mobile versions of it, it probably never will be.
Browser apps such as Skyfire, iSwifter, Puffin and Photon 'work' on some sites, but judging by their reviews not all sites. Also some websites, especially news sites, have their own apps in the App Store.
If you do a search on this forum you will find hundreds of other threads on the subject.
Flash has never worked on the iPad. If it's that frustrating and you've only had it a week, you can return it.
There are a number of 3rd party apps that allow you to view flash websites through external servers (basically connecting remotely to another computer), but reviews are mixed.