I got started into the R/C hobby in general with cheap toy coaxials like that one. They are fun and can get you hooked fast. From my experience, you cannot buy replacement blades for those toy heli's. I have had success replacing the entire set of blades using working blades from other broken toy heli's. If you have fun flying that one, you might want to look into upgrading to a hobby grade coaxial. The Blade brand by E-flite has a few low priced starter heli's that you CAN easily purchase a full line of replacement components for; the best part being that you can actually use another battery while another is charging. Check out the
www.horizonhobby.com/ website for starters and see if anything there catches your interest. I only recommend them because my local hobby shop is supplied by them and I have not tried any other brands with the exception of a Skyartech single rotor which I got off the internet and which I am sure was a cheap knock-off of a real product.