Don't worry about sounding stupid. Everybody was new to this stuff at one point.
The Bilstien 5100 shocks can only lift the front of your truck. They work by pre-loading your front coils to increase your ground clearence. In the rear there are no coils, thus it can't provide any lift. The 5100s in the rear will improve your ride quality though. The maximum lift you can get in the front with the 5100s is 2.5" or 1/2 an inch less than the Toytec kit.
The Toytec lift
will lift the front of your truck 3 inches by placing a spacer between the coil and its housing. The rear of the truck will be lifted one inch by doing what is called AAL, which means add a leaf. The leaf springs are a part of your rear suspension.
Another thing to consider is if your truck has had the rear suspension TSB done. If it has then it should have 3 leaf springs and 1 overload spring, if it only has 2 leafs and 1 overload then your truck does not have the updated factory leaf springs. If you don't know what a leaf spring is I will post a pic of my truck Tomorrow to show you what I am talking about.