Originally posted here by FallenZer0
I've a W2KP. How do I know if the Processor has a 32 or a 64 bit data bus width? Where is this information stored?
What processor do you have?

How do I find, what type of memory I've, like SDR-SDRAM - DDR-SDRAM or something else?
Most BIOSes will tell you this info.
Where is this information stored?
It isn't or else it's in the BIOS.
How many bits are used for addressing memory cells?
That depends on the type of processor used.
How many bits are stored in a memory cell?
Not sure what you mean.
What is the data bus width for the memory?
That depends on the mainboard and processor type.

Is it possible to view the contents of Registers, L1/L2 Cache, and RAM?

Not sure about the cache but a debugger will show you the registers and could be used to 'browse' your RAM.