Re: new to this
You could keep your car and save a bunch on gas money. Depends how far you have to go for work. The engine you most likely saw is a 2 stroke "china girl" or also known as "happy time" engine. The bikes with the engine can last a very long time if built right. The engines aren't built well in the factory and are known to be a jack in the box. You never know if you have a good one until you ride for a couple hundred miles. If you follow a guide from al.fisherman you won't have issues, but it requires a bit more mechanical aptitude
There are alternatives that can last you a very long time. You may consider a friction drive (mounts over the rear tire) from thatsdax.com. Any member here will recommend thatsdax. It may not be the best website but if you call Duane you'll see why. Best customer support out of any vendor out there.