chrome box questions?

goshawk on horseback

hello all,
am seriously thinking about getting a chromebox, but have a few questions please, as follows:
1, is there an easy way for a total to turn the talkback on the first time a chromebox is switched on?
2, would adding a touch screen monitor help, make no difference to, or hinder accessibility?
3, are there any external soundcards, and/or webcams/video cameras that will work with a chromebox?
4, will a standard pc keyboard work, or would I need some sort of specialist chromebox keyboard that has certain special keys?
and 5, can standard external USB hubs be used with a chromebox? (as the ones I have been looking at seem to only have a few USB ports).

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