A taxi ride normally takes about 30 minutes. The fare is in the region of 130 Dutch Guilders, but is heavily dependent on the traffic situation. Direct trains run at 7 and 37 minutes past each hour. The journey time is 41 minutes. The single fare is 11 Dutch guilders.
Dutch railways offers an online timetable service in English, which gives exact departure times.
On arrival at Hilversum Noord, go over the footbridge. You'll see a main road which runs parallel with the railway tracks. On exiting the station, turn right and follow the footpath on the main road. Unless it is very misty, you will see a huge PTT telecommunications tower in front of you. You will pass TV studios on your left.