Newbie needs help – Camaro bought – what’s next?

Hello together, how many of you I have in front of me as Newbie also many problems. Although I have got in the forum, but somehow I didn’t really find out. Since many of you have already done all this, I would be very happy about your help. So this is the following: I live in Thuringia and recently bought a 79er Camaro and would like to have it back on the road. He is in a mediocre condition and was not allowed for 7 years. the last registration was issued a new vehicle letter, in which are some entries, which I would like to have re-entered (e.g. a completely empty exhaust with sidepipes with 8 (i.e. each 4) seperate pipes and angled tailpieces). How do I proceed with the registration (I would like to have 07er registration plates and my parents and I are with the alliance)? 1. Put the car technically in order? 2. Full acceptance by Dekra (does this also the TÜV?)? 3. ???? What do I have to pay attention to? W o could there be problems? How do I proceed? Please continue to help me…