I have a 2000 Audi A6 2.7T w/Quattro. The car is putting out the following codes in this order:

Engine Codes
17965
17521
16487
17831
17819
17535
17537
17743

Transmittion Codes
18265

Can someone please tell me what is going on and what I need to have done. The car seems to be a little ruff in the mornings on the startups. After a min or so she seems to run fine. Also my transmission seems to be sticking in gears sometimes unless I use the Tiptronic shift. Another issue that just started is that the EPC light comes on when I hit over 80-85 and my car goes into failure mode as the manual says and I have a huge decrease in power. If someone can please assist me with some info and maybe a possible repair cost, please let me know. It will be a huge help.

I haven't had the car long and I have had many things replaced including the ABS controler a few weeks back, the throttle body, water pumps. I feel like this car was in a flood or something because it's just one thing after another and it is getting hella expensive. Any advice would be great. The car has 65K miles FYI.