Q: Do I have to make takbir to make sujud tilawah?
A: There are 14 verses in the Qur'an after which prostration is legislated. To perform this prostration, whether in prayer or not, 2 takbirs are made. The first takbir is made before you prostrate and the second is made when you raise from prostration.
If you are not in prayer, after the second takbir you sit and then you sit and make taslim.
Source: Hidayt al-Raghib