how much is the typical labor on replacing a ford focus motor?

a rebuilt engine.

If it is rebuilt & that includes labor & parts then it isn't a bad deal.

The bigger question is if the rest of a twelve year old economy car merits an investment like that.Usually not.

I would have to agree. Of course people can't always afford to buy new cars so they have to fix what they have. If you have a really good mechanic they'll take care of you by keeping you informed about the reality of your vehicle because being a shop owner isn't just about your bottom line, it's also about helping people out (imo).