1 - It's default haircut, 2 - it's a program, not the actual game. Import to the game not so simple (with working animations and proportion), but you can download Facegen Modeller, pick 2 actor photos and create a model by yourself just to see how the actors in the game might look.
Oh, and you can check 2 mods with redesign https://www.nexusmods.com/newvegas/mods/39218 https://www.nexusmods.com/newvegas/mods/56312
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Import to the game not so simple (with working animations and proportion), but you can download Facegen Modeller, pick 2 actor photos and create a model by yourself just to see how the actors in the game might look.
Oh, and you can check 2 mods with redesign
https://www.nexusmods.com/newvegas/mods/39218
https://www.nexusmods.com/newvegas/mods/56312