Get a K-30 or a Lil Will magnet mount antenna for a quick setup (there are better, more expensive one's out there, but these are good). Make sure you set the swr's before trying to transmit, or you will fry the radio. Once the swr's are good, you can remove and replace the antenna as needed. Just put the antenna back in the same location each time, as a change will also change the swr's. Best place is center of the roof.
As for a radio Uniden Pro 510's or 520's are great little radio's and can be had for $49.00 and $59.00 respectivly. Loud little talkers. As for a mount, just shove it between the seat and console, you may need an external speaker though. Midland makes a nice handheld, but I've never had good performance from any handhelds except my Cherokee AH-100, modded to 400 channels and it has single sideband too.
Feel free to ask away if you have any other CB Radio questions, I can help you out as far as info, or where to get stuff, mild to wild, it's only money.