Subaru Impreza III 2.0D, 2011, engine problems?

Hello and Servus to all, I have now bought a boxer Diesel Impreza III 2.0D, year 2011, 109hp, 130,000Km from a private person (not yet in operation, since I have no time to collect and register) and have started to google after spare parts costs, service from the control chain or timing belts etc.. After a short time have started sweating since many of engine damage, problems with the DPF and even more problems with the engine report. Mainly the years of construction 2008,200 9,2010 and models like Legacy and Forester are affected, you read almost nothing from Impreza and the following years of construction. Can I calm down or have I done myself no favor with the purchase? Fin: JF1GHDLZ3BG…… Driving profile: Mo-Fr 15km to work and against home (mountain road 5km, country road 8km, Innerorts 2km) Saturday shopping in the larger neighboring municipality highway not so often, is not on the way