Do they have flowers and when can I repot to larger pot?
Grown outdoors, they do flower in October. However, unless you can give a potted plant an extreme level of light (a solarium, or summers outdoors) you're unlikely to see them. This article has some information you might find interesting. http://www.clemson.edu/extension/hgic/plants/landscape/shrubs/hgic1088.html
Repotting is a topic without a lot of agreement. Some people advise repotting every year, some every 2 years, some only when necessary. Some people recommend repotting only in early summer, just before the plant goes into its major growth cycle. Others find repotting at any time is successful. The pertinent questions about repotting are how large a pot, what kind of soil, and does the plant really need repotting. This article will get you started on answering those questions: https://www.gardeningknowhow.com/houseplants/hpgen/learn-more-about-repotting-houseplants.htm