Can u trade in a car u still owe payments on?

yes

Check Kelly Blue Book- kbb.com

I have a Toyota Camry 2009 how much could i trade that in for? Its in good condition runs good. Im just looking for something bigger

Yes! To know exactly how much you will nee to have us apparasie it. But to get an idea start here https://www.jerrystoyota.com/Value-Your-Trade.html