a stock ultra pro would be fine, but if you already have a stock pro you dont need new wheels untill u ruin the ones you have, otherwise just -
bolt ur foldy
make a new crossbar for stock bars, just make it 18 wide and cut it down to your likings - you can do this by removing the small tubes on the sides of the bars, then buying another in the length you want, putting it in, and bolting it
get bmx grips and new griptape
If its ur first day scootering you shouldnt really be wondering about parts, you wont be riding hard or breaking any parts..just focus on learning new tricks