If you can take that car to a body man, shop have them look at the Camaro for you a lot of people try and cover up a lot of rust, just like you said by painting.
It's good you noticed all of that, No doc are any clue on the original motor or trans ??? Check and see if you can find a trim tag. If you can look the numbers up on the internet you will find more info. Firewall, driverside trim tag. Looks like a great driver but there are some real great deals out there, if your going to pay the money, just do the reseach if that is what you want.
I agree with 2SSJim will end up costing a lot of $$$. it's up too you but a lot of other Camaros out there and yes you have the 2010 out there too
Hope this helps, btw welcome to the site. If there is any other questions let me know or PM me.