If you have an A4 printer and you're printing onto A4 paper, there'll always be a white border (approx 7mm) on the edge of your document. The only way to overcome this is to make your artwork slightly smaller (so the crop marks actually get printed out) or get a printer that prints edge to edge.
My advise would be: Don't print out your leaflets on a "crappy Epson SX125"
Haha! Seriously, if you want to look professional, the quality of the print is just as important as the quality of design. Go to your local copy-shop and have them digitally printed, shouldn't be too expensive.