Hi Gino,
I am graphic designer, and I have been adviced for years to keep the default settings of my scanners (except if u have a real one on a pro. level then u do use different software and parameters for the job bot it is another world I think for u;o)
Anyway, guat a 1200/1200 scanner, usfull if u want to magnify pictures (then u need more data) and just scan!
Then, THE tool is Photoshop. Use the curves, choose a color channel, U will make miracles!
Another way is to use the levels, it gaves U an approach of the amount of data ur picture have and u can see its limits (burning the whites etc...)