Your best bet - for either of those two - is going to be buy (a) pre-made pattern(s).
For the first one - find a pattern for a longish skirt and use that - or your other option (and this is going off MY body measurements 27" waist 32" hips)
get approx. 3 yards of fabric, cut down the fold, sew both sides together, baste the "waist" and gather, sew on a waistband (or sew in elastic), hem....
this gives you a fairly full skirt that is pretty long - you can obviously hem it up more if you want it to be shorter.
I use this method when making my skirts for Ren Faire because it's really simple, can be done in less than an hour (for me) and produces a fairly full, full length skirt.
In addition to the skirt, you could buy a white T-shirt and probably fabric paint on the sleeves in that purpley color.
As for her apron, most major pattern companies have apron patterns.
Her little kerchief thing is probably a big square of fabric folded on a diagonal
and then buy some brown boots.
The second one i'd say buy a white, scoop neck, 3/4 length sleeve top.
For the dress - find a pattern that looks like that (i know there are some I've been scouring dress patterns of late) and rather than sewing it in all one color, sew it in that red and blue. Again, paint the design on the skirt.
You can also just sew some red buttons on the front - OR if you're feeling really ambitions make them working buttons, but if youre not an experienced sewer this could be difficult