Let start the texturing part.
First we will make a copy of the existing unwrapped UVmap.
We do that by pressing the new button besides it.
I renamed it to Ao because we are going to use it for Ambient occlusion later.
You see we still have selected the first layer.
Now add a new material . Set the material input from the default ORCO to UV because we want to use the uv layer.
Also add the texture , the round one. don't forget to set it to "image", i won't get into detail how to do this, i suppose you already know.
In the uv editor choose the same image from the pull down menu ,you can fix it there if you want.
Now in 3d window go to texture mode.
tab into edit mode and select all.
if the screen in the 3 d window stays black, its because you have the emit value not set yet.
Go to the info panel and set the emit slider to 0.5
Now you can start texturing in the uv/image editor. first deselect all vertices in there.
Now select one vertice of the one of the circles in the uv editor.
Press Ctrl L while in the UV editor and you have selected the top or the bottom of the cylinder.
Drag it to the center and scale it up until it corresponds with your wishes .
You can see the result immdiately in the 3D window.
Repeat this for the the other circel
And finally for the square formed side of the cylinder.
Scale that one up till it fits in y direction and scale twice as big in x direction.
Now the texturing is done , the result is shown here.
Hmm, i don't want those round texture on the side.
We will change that with another UV layout in the next tutorial.