I shall reaching Kunming on 5/5/2015.

First of all, one day is not enough for all the attraction sites. But here are the bus routes for reference:

Stone forest is located far from downtown area and trip to the site may take a day. From railway station, you can take bus Z12 to East Railway Station, then change to bus K17 to Hongqiao Over Pass East, and then walk to East Coach Station. The city bus ride takes about an hour. Upon arrival, take a coach to stone forest. The coach ride takes about 2 hours.
You can also take a train from the railway station to Shilin Railway Station, then take the sightseeing bus to get to the scenic area. You can check the train schedule on this website on your own.

To Dianchi Lake: Take bus 44 to Hewei Village, then change to 183 to Haigeng, then walk about 200 yards to reach it.

To Bird and Flower Market: Take bus 52 to Art Theater, and then walk about 450 yards to get there.

To Golden Temple: Take bus 57 to get there directly.