Default [Q] theme maker ,font and imei and seriel number

how do u make themes ? is there like a pc application like sony Ericsson theme maker which allows u to make ure own themes ?
with fonts based on whats currently offered on lg smart world what would be closest to the font foudn on xperia Z devices ?
lastly where is the seriel number and imei located on the lg gpad , normally its lcoated withn the settings but cannot find it ..