If you have never skied before, I really wouldn't go all out on gear.
Goggles serve two purposes: reducing the glare off the snow and keeping your eyes from tearing up when you are skiing fast. Sunglasses should be just fine your first few times out.
Invest in some waterproof pants. As a first timer, if you are learning that means you are falling. I have been skiing my whole life and my step-dad (who skis circles around the kids on the slopes) says that if you didn't fall today then you didn't learn anything.
I know this may not be a popular opinion amongst fashionistas but as soon as you leave the bunny slope and head to the real hill, you need to wear a helmet. My sister is a ski instructor in Aspen and she would never let me near the slopes without a helmet. She says that if you are just there to look cute and not to ski, stay off the slopes. If you're there to ski, put your helmet on and go!