Chip number 132 is Snake, and can be obtained from Higsby in the form of Snake R after completing his jobs.
you can't. Dark aura can only be gotten in megaman battle network 3 BLUE. You get it by doing all the time trials in secret net. In WHITE, you get the Serenade chip.
Cheat, or enter a commlink with a friend who has the chip in their library. You should then be able to order it from Higsby with the OrderSys assuming your "complete the library" function is on.
no you can only link megaman games together if it is the same number like megaman battle network 3 blue to megaman battle network 3 white
Life Aura can be found on the Scuttle viruses in the Secret Area (repels attacks < 200 dmg), and Dark Aura is not available in White. I believe Dream Aura is a combo, not a chip (Dark Aura + Sanctuary, maybe?).
Go to GameFAQs; they have a chip list FAQ.
Talk to Tora (either in the DNN building or at Wily's Base) to fight KingMan Alpha. Delete KingMan Alpha to get the KingMan v2 chip.
There is a Sanctuary chip located deep in the Secret Area. Other than that, you'll need to abuse chip traders and BugFrag traders, or just trade it from a friend. Or, cheat.
hospital
you get it from a guy in secret area 1
By deleting Bashers, which are at the WWW Base, or use the chip trader to get Magnum 1 A.
you cant
Oh boy. Search Megaman Battlenetwork 3 White ROM on Google and you'll get enough hits on the first page to download at least 3. But don't ask that question. Please.