Here’s a general compilation of tips I learned from our December 2013 trip 🙂
How to get there: Coming from Cubao, you can try the Philtranco terminal on Edsa, sometimes Tagaytay-bound buses pass there. Or you can go directly to Pasay for Nasugbu- or Tagaytay-bound buses. You can also catch a Dasma/Palapala bus, then get on a Tagaytay-bound bus at Robinsons Dasma. But I recommend the 3rd option only as a last resort, as you will pass thru what seems like every town in Cavite.