Small problems with huge effect:
1. There is no possibility in Mac to change the font size system wide.
2. Track pad doesn’t have a button for right click.
3. You can’t cut a file and paste it somewhere else. (unbelievable!!)
4. If you want to save a file you can’t choose the subfolder which you want.
5. If you set the view option to Icon, you can only see a short form of the long file names.
6. By picture view you can’t navigate from one picture to the other using the arrow keys on your keyboard.
Shame!
first, why don't you tell us how much time have you invested in learning how to work on it? I've been on my MacBook for over 3 years now, and I'm STILL finding out about stuff and functionalities that make my experience even easier!
I'm gonna try and help you out as much as I can, and trust me, if you invest just a small fraction of your time and do some research (say,
google?) instead of nagging, you'll actually find what you're looking for!
1. No idea on this one, but I guess there should be a plug-in somewhere that helps you out.
2. go to System Preferences -> Trackpad, and from there you can activate the "tap to click" and "tap with two fingers to right-click" you'll get used to it, it's really smooth
3. that is my ONE and ONLY,
I REPEAT, my one and only complaint about Mac OS.
[correction]: Mac OS Lion now has that functionality 
4. yes you can. when you're prompted to save a file, there's a small triangle on the right that's facing down, click it and it opens up to choose a folder.
5. actually it's cleaner this way, so that when you have icons with long names it doesn't take out a few icons below it... you want to see long names? switch to Detail view.
6. and yes you can. if you're seeing them through "quick look", that is when you press the space bar when you're on an icon, you can navigate with the tab and shift-tab for the next and previous files.
there you have it. I hope it helps. and please, please, PLEASE: don't freak out on your first mac and give it some time to grow on you, trust me, it'll be all worth it!