What quantity & cuts do you get from a whole cow?
Can I order 1 tenderloin and 1 set of Porterhouse steaks for example?
A whole cow has two loins, so yes you can have one cut into porterhouse steaks and the other cut into a tenderloin.
Here's a good video showing all the parts of a side of beef:
part 1part 2(it is a little out of date though)