I know this is kind of old, but I will try to help you as much as possible.
I would recommend at least 30 hardware employees, 40 would be ideal.
Also, consoles are VERY expansive to produce and can quickly cause your company to go bankrupt. I would recommend at least 100 million, more the safer. To be safe, wait until 200 million.
If you pick the best parts, your console will be very expansive and may take longer to make, but will probably last longer. For your first console, I say keep costs under $1000 as much as possible.
Before you do though, make sure to research chips such as chip miniaturization. Its in the company knowledge page, but you need a research facility to research them I believe. There's also the peripherals page where you should research apps (word processor, database, etc) and console controller and casing.
You have to keep everything apart with space in between to prevent over heating. At the bottom, there is a box that will tell you how good the connection is and the cost (Something like: CPU-GPU = Fair, $20) Move them around and experiment until you have something with a good rating that doesn't overheat.
Some advice: Don't stop making games! You will need to money!
As for porting, I cannot help you much but I can say that the best way to find out is to try different things and experiment. Also, try making games only for Nintendo and only for Playstation. Your company's experience (not knowledge) may affect porting. Also, the game genre may affect the quality of the port as well.
For tips on producing a console, read this thread: http://z11.invisionfree.com/VelociGames/in...p?showtopic=347
It's about starting a hardware only company but there's some good advice on producing consoles.
Hope this helped and good luck!