You can buy silicone 'breasts' for about $30 a pair or make some out of like birdseed, rice or similar substance and a pair of knee highs.
If money is tight, and you know nothing, get some 'gift set' cheep makeup deals they seem to sell at Xmas, and only at Xmas. But when you go out you will want the good stuff, or at least the 'popular' brands - mainstream stuff, Revlon, CoverGirl - but it takes a while to get it right, might as well practice with the cheep stuff.
Shop at thrift stores, garage sales, and the like for cheap clothes.
I would also suggest a pair of everyday, 'I can walk miles in these things' MaryJanes or similar flat shoe.