Unfortunately, the stock classic taskbar/theme is no longer available in Windows 7. The new one takes some getting used to, but I think it's better in the end. It's nice to keep your frequently used programs docked on the taskbar for one-click access and everything seems more organized and streamlined.
I ran a quick Google search and this turned up.
I haven't read much about it or tried it, so take it with a grain of salt but it might be an okay replacement for the start menu. As for the taskbar, I don't know.