You have a new battery now, right?
Get someone to check the voltage while you are trying to start it.
If the voltage goes down substantially you are probably getting
plenty of current to the starter but it isn't cranking.
Be sure the tranny is in neutral when you do this to eliminate the
possibility of a stuck clutch.
(That can be remedied once you get it to where it will start. This is done
easiest using the "lurch" method.)
Another possibility is that the starter is stuck in the engaged position.
Usually this can be cured by putting the car in 4th and rolling it back and
forth enough to turn the engine slightly both ways. The spring should then
pull the gear out of engagement.
It could also be that your starter solenoid is working OK but the internal
contacts are arced or eroded and not making good contact. Normally this will
show up as a good strong click when you try to crank but only a slight drop in
voltage at the time. Frequently in this case out of several attempts one will
make good enough contact to start the car.
In the meanwhile put your little charger on the battery in between times to
make sure the battery is good and hot.
--
George Downs Bartlesville, Heart of the USA!