How to get normal (classic) toolbars in Office 2007?

A quick google showed me this blog post, have not tried it myself though.

No. The new ribbon interface (fluent UI) is the only available menu style in office 2007. There is no official option to switch to the classic menu bars.

(There are 3rd party apps and custom hacks that you could use to build up menus that looked like the old ones in the Ribbon - see tnorthcutt's answer)

If you want my honest advice though, don't try and force it back to how it was. Just take the time to learn the new interface. When it comes right down to it, it's just a slightly different button placement, you'll get used to it surprisingly quickly. There is no real reason to hang onto the past, embrace the change for what it is and work with it. Every time some new software comes out that changes something people moan about it for a while, not because it's actually worse but just because it's different. Different isn't a good reason to moan. Try it out. when you've tried it out for a few months and learnt where the common buttons are, if you then have a genuine reason to dislike it, then you can change.