recently replaced some drywall and relocated my wall phone line. The grey phone line is a bit to short and I wanted to splice a extension onto the short line. I bought some new phone line to try and splice it together. Not sure how to do this. The old phone line sticking out of the wall is only 1 inch long. I heard about the scotchloks.? Is this what I should use. Or should I just wire them together myself and tape them together ????

Standard wire connectors are not the way to go. You need to track down some insulation displacement connectors just like the phone company uses. The big box home centers might have them, otherwise try an electrical supply house. No special tools are needed, just a pair of pliers.