hehe would be better to start with question Well i guess welcome to forum as its your 1st post!
I think your best bet would be asking this question in Aurdrino site in hardware section. Interfacing with capacitive panel will depand on type of connection it has. Resitive screens have 4 wire communication protocol, capacitive have tooo many so you need to find out form screeen manufacurer. If you dont wnat to get too much in development better to get existing phone kits and you are set Im thinking to build my own advanced system but probably will neve get there as there too many projects, little money and my car does not like remote starters