Your height: 5'0" to 5'5" (153 to 165cm) approximatly (?).
Frame size = 19.75in/50cm
Comments:
2 new tires
City Bikes: They are designed for comfort and daily commuting, to go to work, to school, to go shopping, etc.. Compromise between performance, comfort and sturdiness. Often loaded with useful accessories increasing the weight.
1 speed: for traveling short distances in a mostly flat neighbourhood. If you can walk there in 30 minutes, it should take around 6 minutes by bike. Not good for going up hills, even low grade climbs are hard. - Derailleur: -
Tires 26 x 1 3/8: narrow tires with small thread, for paved road, very common on older bikes.