Can I trade in a Suzuki Reno for a Scion XB?

My mom currently has a suzuki reno...and when I turn 16 next year...she was going to either give that to me or buy me a new car. I'm wanting the Scion XB. (: So I suggested that we trade in the Suzuki Reno...and pay a little extra money for the Scion XB. Is this possible? & where can I do it?