Welcome all!  I've been around this forum for a long time; it's populated with lots of folks who really do know this software and love it.

I'm one who falls in the "love it" category, and the "hope I can figure out what I need to do" category.....

I'm not familiar with Bryce (haven't touched it since sometime in the mid '90's), but I do believe that Carrara is a much more robust program with more detailed modeling capabilities.  Bryce does some amazing things, but once you get used to Carrara, you'll be hooked.

As for your render question, I'd suggest looking in the help file for render queue or batch render. (I'm not in front of my computer with C5pro on it, so I don't remember exactly what it's called.)  That functionality is in there. 

As for DPI, check the specs on the color laser printer.  I have a fabulous color ink-jet printer that specifies 150 dpi, but I tend to render anything for print out at 300 dpi, just in case I wind up sending it off to a different print facility.

"Multireplicate?"  Don't know what that is.  Carrara does have a great surface replicator.  Is that what you're looking for?

Good luck!

• Dex