Why won't turn all the way over

When was the last time you had a tuneup ? Sounds like the spark plugs are not firing.

I bought it off used carlot in March so not recently.this is the story. Someone tried to steal it but busted ignition. Put a new 1 and didn't start up. So checked battery it was no good bought a new one and still won't go all the way over. And the key is still my key. Do they still need to program my key with new ignition switch