If i buy a comcast from ebay will it work?

I have a 2001 Mustang and I want to get a spare key, will it work if I buy a blank from ebay and get it cut?

• I'm worried about there being a chip in my key that if I get a blank one it won't work in the ignition. Also, i wanted to buy a keyless remote, they sell those on ebay too, buy I'm worried that it might not work. Any ideas, tips, experiences, etceteras? Oh, and I was also interested in getting a power antenna. Thanks :)

• Answer:

  The 2001 Mustang came with the computer chip key as standard equipment. You can buy a blank key on ebay and get it cut, but a locksmith or dealer will have to program the key into the car's computer for it to start the vehicle. Before someone jumps in saying you can do it yourself, it takes two programmed keys to add a third, you cannot add a second key with only one working key. The keyless remote can be purchased and programmed without needing a locksmith or dealer. Don't know anything about a power antennae.