There is Metro train connectivity (Green-line) and are many city buses available from Majestic (Bus stand) K R Market  and Banashankari to reach Vaikuntha Hill. You have to alight at the stop – Doddakallasandra (Kanakapura Road) and it takes about 10 minutes to reach the temple by road and around 20 minutes by walk.

vaikuntha-hill-route-map