Yes we did have a car, I think they charged us $20 a day to park it there. Our room was in the tower that was across from the lobby. Our room actually faced the interstate but you could see some of mission bay from the balcony. We didn't hear any noise from the interstate. The room itself was really nice, we had 2 queen beds and they were very comfortable.
We only went to the pool once. You have to use your key to get in. The pool was pretty big but it wasn't really anything special. i.e. no slides or anything. The shallow end was roped off but it was 3 1/2 feet so we had to stay in the pool with our youngest. The deep end was a lot bigger and I think at the deepest it was 12 feet. There was an actual kiddie pool. I didn't go over to it so I don't know if it was a wading pool or if it was a little deeper. It looked pretty small though. There was a band playing at the pool, I think they were doing 70's cover and they were SO LOUD. I don't know if they play every day. One cool thing is that they showed Nemo at the pool one night. They handed out warm towels that we used as a blanket. They were also selling hot chocolate and popcorn.
I hope that helps. Let me know if you have any more questions.