TDI V6 Timing: AKN Engine Specs & Guide

Hello,

'I'm a complete beginner when it comes to VAG and TDI engines. I bought an A4 2.5 with minor accident damage, BUT... unfortunately, one of the camshaft gears broke due to the accident. I was told that the car was bumped in a parking lot and the engine wasn't running... otherwise, I wouldn't have bought the car! However, while disassembling it, I noticed that someone must have tried to start the engine at some point, as there are marks on the timing belt near the crankshaft sprocket.'
My question: Does anyone know of similar cases with this motor and its output? What kind of damage should I expect?
I couldn't find the adjustment points for setting the valve timing in the manuals. Does anyone have the data they could email me?

Thank you in advance for your help.

Best regards,
Eagle.