Honda Civic Coolant Leak

If it leaks right back out as you install it, then you obviously have a major leak in the cooling system; check all the hoses are in place, the overflow bottle (aka degas bottle) isn't cracked, the hoses to the overflow are good, the thermostat is good, the bypass house is in place and good, and the engine freeze plugs are intact. Don't drive with low or no coolant, overheating is a great way to destroy a motor. The "no start" and overheating may or may not be related, so don't treat them as symptoms of the same problem.