|To your questions:|
1. That is an APU, which is the CPU and graphics combined into one chip. The CPU itself has 4 cores and the GPU has 8 ROP's, or Render Output Processors (iirc). And on the 8350, Yep, 8 cores. For most things a 6-core FX 6xxx series CPU is just fine.
2. Read above. APU's are a one-piece, low-cost solution to having a discrete GPU and for small form factor PC's.
3. APU's are a great way for desktops. However if you absolutely *really* need the extra power, getting a FX-series and a R9-series GPU is the way to go.
Not everyone can decipher Klingon script...
chay' ta' SoH tlhe' vam Doch Daq