Custom Exhaust Fix and Body Repair Price Expectations

[lightdisc2]

I have a few questions to offer about some repairs on my 08 liftback 2 door.

First is my muffler needs replaced and I was going to get this welded on. The current muffler is bolted on and the rest of the exhaust is stock. Mostly unsure if the 2" inlet will work given I'm pretty sure the exhaust piping is 1.75".

Second I may be getting some driver side rear quarter panel rust repaired. It is in the usual area and only about 1.5x2.5" and has been treated with rustoleum and touch up paint several times. Can anyone give me a fair price estimate to expect for 1. fixing without replacing quarter panel and 2. fixing with replacing it.

Last is the typical clear coat damage which I have a lot of on the roof and hatch. How much have you guys paid for re-painting just the roof and/or hatch?

Rough estimates are great as I may not be able to get to adding photos for a while if needed. Thanks for reading and for any responses.