Like in US?
Do they have 5th amendment?
Does Indonesia have 5th amendment kind of thing?
Do I have a right to remain silent? And if I have, should I?
The US Fifth Amendment right to silence has multiple consequences, one being that the police cannot beat a confession out of you, you cannot be compelled to testify against yourself, and if you refuse to testify, your refusal cannot be considered as evidence of your guilt. There is a related right (the Miranda right), that when arrested, police must inform you of your right to silence and an attorney. On the topic of silence being held against you, that aspect of 5th Amendment rights does not exist in England and Wales, but it remains in Scotland. In fact, in the US there is a kind of "exception" to the rule that silence cannot be held against you, in the form of "adoptive admissions", where your failure to deny an accusation can be introduced as evidence against you in trial (you can overcome this exception by explicitly invoking your right to silence). The right to silence is generally recognized in common law jurisdictions, but is not historically part of inquisitorial systems (but has spread to such systems in the modern era). Even within common law jurisdictions, the foundation of this right varies. It is encoded in the US Constitution, but is not a constitutional right in Australia. Under French law, a suspect being questioned by a judge during an investigation must be informed of his right to silence, and at trial he can be compelled to testify, but he is free to say whatever he wants, including telling lies.
As for Indonesia, Ch. VI of the Law of Criminal Procedure covers any supposed right to silence: Art 66 says that "A suspect or an accused shall not bear the burden of proof". However, Article 175 says "If the accused declines to answer or refuses to answer a question addressed to him, the head judge at trial shall suggest that he answer and thereafter the examination shall be continued". See also this article by Amnesty International which concludes that there is no formal right to silence in Indonesian law, and there is an obligation to answer questions.