What you have is an early 90's Tomos Targa (not a targa lx), I imagine its something like a 1993 or 1994. It has the A35 motor, which is 50cc with a 2 speed automatic transmission and is oil injected. Its a very common bike and will be easy to locate parts for, you may even have a local dealer. Its a good solid bike with a good engine, this engine was used until something like 2007. It also has a dellorto sha carburetor, which is one of the most common carburetors used on mopeds. It happens to be very simple and easy to service. All in all it should be pretty cheap and easy to get it into top shape.
You can view the repair manual here.
http://www.mopedriders.com/article_view.php?faq=2&fldAuto=21
You can also check to see if you have a local tomos dealer.
http://www.tomosusa.com/pages/verkooppunten
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