Hi. First make sure the ground from the negative post on the battery to the engine block is still in one piece.
If the engine cranks when you turn the key you need to repair or replace the wire from the - (distributor) side of the coil to the points. Them you can run a jumper from the battery to the + (battery) side of the coil. When you connect the battery to the coil the primary ignition is "hot", and when you crank the motor is should have spark, and run. To shut it off, remove the jumper wire from the coil or battery.
If the engine does not spin with the key you can test and jump the solenoid. Check the heavy wire from the battery to the solenoid, and the solenoid to the starter for damage.If they look good, remove the small wire from under the big wire that comes from the battery. You can test the little wire by using a test light and seeing if it is hot when a helper turns the key to "start" The little wire is from the ignition switch, and is only hot when the key is turned to start, to activated the solenoid, and spin the starter. If the little wire is not working, you can use a remote starter switch or just jump the big wire post from the battery to the little post (with the little wire disconnected) with a big screwdriver to activate the solenoid and the starter should spin.
That is the easiest way to hot wire the ignition and jump the starter.
Note that you will get a nice spark at the solenoid, only temporary, and you will not get a shock, and also don't leave the coil hooked up when the engine is not running. Good luck