Strong white bread flour is cheap (about 68p in Lidl, Tesco, Sainsburies, Asda) Strong brown is over a pound.
A basic bread for the breadmaker is about 3 cups flour (white/brown or a lot of times I do a mix), level teaspoon salt, couple teaspoons sugar (just to help the yeast) and a satchet of yeast. Only thing to add is about a cup of warm water.
May I suggest you look in the shops for the bread mixes (rye, sunflower, ciabatta, granary..etc) that are smaller packs (about 500+ grams) and just need water.. They'll help you get to terms with the bread maker and how wet/dry the dough should be and also how well it bakes the loaves..
For example here's a Granary mix in asda
http://groceries.asda.com/asda-estor...99&startValue=