I don't know whether they put a colour in her hair but by episode 3 it's much blonder and smoother, the first two episodes it's like a frizz bomb bless her! I think they must have purposfully made it look like that as it never looks that way again.

I suppose her clothes must have been quite daring for 1920 when most women were still corseted and very similar in neutral colours - those silk waistcoats and blouses she got from her father were quite something on her I think, although she did have a few awful numbers too like that black dress sack thing. She definitely found her fashion voice in series 2, but it's all about experimentation early on!