Can anybody give me an idea of what I can expect to pay to have new brick mold installed around my front door?
Depends on the size of the door and the type brick mold.
If you use wood finger-jointed brick mold, you can expect to pay about $20.00 for the three 7 ft lengths you will need for a standard size door. But you will have to add for for paint and labor to install and paint.
If you use solid vinyl brick mold, it will cost you about $35 for the same three 7 ft lengths, but there is no painting involved.
Time for a professional carpenter to pick up the material, deliver it and install it clean up and get rid of any debris...figure 1/2 day of his time at about $150 minimum.