Pics, help me get cut!!!!!

Sup,
 I'm 28 years old  Hgt 5'8  Wht 160lbs.  body fat 17% Never worked out in my life. I'm finally ready to get muscles and a six pack.Ready to be serious. I recently went and purchased Biogenetix  Body transformation kit incl:fat burner, Nitri Oxide, Creatine and whey protien, 100 bucks gone!!.  Changed my diet according to the kits instructions.vitamins  I'v been going to the gym "Bally's for 3 weeks now. no major diffrence in my body other than I can feel muscle in my chest and stomach.
 
My workout plan consist of working on my chest 100-135 lbs 4x12 and arms-70-80lbs 4x12 using all the machines and about 500 front and side crunches and middle back crunches.
 
PICS attached to help critque!!!!
 
Need Help with: Am I on the right track?
How many pounds should I be lifting?
How many times and duration to see results?
Am I taking the right combination of supplements?
 
 

Attached Image(s)

Changing your diet according to a box of supplements is not the way to go my man

Take a look at this to calculated your daily caloric needs so you can start off the right way
It also has a spreadsheet on the bottom if your to lazy to read the whole thing

http://www.discussbodybuilding.com/How_Many_Calories_Do_You_Need%3a_Calorie_Calculators_-_Includes_Quick_Spreadsheet_Too!/m_45013/tm.htm

If you new to lifting even for a cut a good basic compound routine would be sufficient enough
Remember when you are cutting your putting your body in a calorie deficient state so your muscle gains and strength gains would not be as great as when bulking

IMO 4x12 is a little high

What exercises are your doing ?
Most importantly your not working legs,back,shoulders, etc you need to work the body as whole

Also if you think doing ab exercises will lose the fat on the stomach no my friend there is no such thing as spot reduction those exercises will only strengthen the abs not lose the fat around, doing five hundred of them is almost a waste

You can only dictate how much you should be lifting everyone is different
Once again with hard work and dedication only time will tell your results

Forget the supplements for right now focus on listing your diet and cleaning it up if its not already

I just starting working on my legs, and my back about a week ago  and I do about 30 min of cardio on the eliptical glider.
 
I'm not a beef eater or pork eater. But I do eat a lot of chicken and turkey and vegetables and protein shakes. But I don't eat alot. And I think that maybe my problem its hard for me to eat all day.
 
I dont want to get too much bigger, just cut and defined.
 
 

That may be the problem

How is it hard?

Try to eat 5-6 meals a day

Take it 1 step at a time

Believe it or not you maybe be under eating and your body is trying to hold on to as much fat as possible for energy

It would be a good idea to calculate your daily caloric needs on the spreadsheet link I provided above