2003 Stratus SXT Key Fob

I just purchased a 2003 Stratus SXT. It did not come with any key fobs. It has power locks and I was wondering if I purchased a key fob for it if I could program it to work with my car?

I also noticed the door locks do not automatically lock like most cars do. Is there a fuse for this or how do I get them to lock automatically?

Thanks!

Jeff