Do I go through customs in Germany?

[staysa c]

This is only my second time travelling anywhere and the first time I travelled it was really hard on me. I want to take my computer and maybe a couple of my favorite dvds and my laptop along with my twilight series since I have alot of stops along with a christmas gift for my friend who i'm staying with. I'm seriously terrified of going through customs and I was just wondering if i'm going to have to go with the stuff I'm taking. any information at all would be helpful. thanks in advance.