it's a little confusing. what do you mean? are you saying that it turns the engine over and starts in the morning and at night it won't start by... not turning over? turns over doesn't start? doesn't turn over? does nothing when you turn the key to start?
it's not supposed to start in gear. if it's an automatic it starts in park or neutral. manual starts with the clutch pushed in.
If you have an automatic and doesn't start in park, try neutral. you could check to see if the neutral safety switch is out of adjustment. hold the brake pedal down, turn the key to the start position and move the shifter around to see if you can get the starter to engage