First time posting here. Wasn't sure the best way to search previous threads on the topic.

Recently purchased a well used 2007 A4 2.0 with 178,000 miles. According to Carfax, it was properly maintained by one owner for the first 151,000 miles of its life (not so sure about the next 27,000). Changed the oil, checked the plugs, and cleaned the MAF sensor (with MAF cleaner). It was running fine for about a week, and then EPC illuminated and the car wouldn't go over maybe 40 mph. Hooked up a code reader and got the following mess:

P0444 (evap purge valve open)
P0243 (waste gate solonoid)
P2295 (fuel pressure reg. circuit low)
P2400 (evap pump circuit low)
P0031 (O2 sensor before cat)
P0036 (O2 sensor after cat)
P0089 (fuel pressure regulator)

Any advice on where to start?

Thanks!