turbo timer

ok i got few questions about the turbo timer!
1) After i took my key out, the car still keeps running when the turbo timer is on, right? When my car is still running without the key, now then i put in my key, and turn it to ACC, then i drive my car, will that work??
2) Will installing a starter affect how the turbo timer works?
3) usually how many mins do u guys set it to keep it running??

thanks alot!