I believe most levels can do this, since it's based on
your 1 rep max weights, it really is tailored to the individual. However, I personally would not recommend this to someone who is an absolute beginner without some basic knowledge of lifting free weights.
I've heard you can use dumbbells to replace most any barbell exercise, but I am very happy I decided to buy one and really enjoy using the barbell for variety in lifting.
There are some inexpensive 55 pound and 100 pound barbell sets out there, I ended up buying 2 sets of the 55 pound, but I just found this 100 pound set at Walmart for only a few dollars more than the smaller set. And you can use the 'ship to store' option to save the shipping fee.
http://www.walmart.com/catalog/product.do?product_id=4404139
If you want to see more of STS, there are clips on this site, and I'm pretty sure on collagevideo.com too.
Just a personal plug, I really love the program, I'm in meso1 week 4 now, and am thrilled with my decision to purchase STS.
Good luck in whatever you decide!