none of this works on my keyboard

I have just reviewed the tutorial on Mac 101 regarding Expose. I am trying to improve my understanding of my Mac.

None of the article relates to my Apple keyboard.

Now, I am not sure if this also relates to the fact my keyboard is garbled.

Also, my keyboard is swapping s for z, and punctuation and modifier keystrokes give random characters.

I have rejigged, in System Preferences, the keyboard to default and reworked any Application shortcuts.

The s and z problem has been resolved but only in Pages. When I key in website addresses, shortcuts etc the s / z problem remains. This is very pesky when juggling websites.

I haven't found a help in Apple or help sites that help with this problem.

Any expereince and success out there?

Thanks.

I love my Mac when it works. When it works it is smarter than I am. What it does, it does exceedingly well. What it doesn't do, it is like a pig with a bucket over its head, it just doesn't do it!