Yes. In Victoria you have a right to silence, so you can refuse a police interview and decline to answer questions, beyond giving basic identifying details. You must still provide your name and address when police lawfully require it, and your licence if you are driving, but you do not have to take part in a record of interview. Critically, your silence cannot be used against you as evidence of guilt.
Not in the sense of taking it back. Once you have given and signed a statement to police in Victoria, it becomes evidence and part of the record, and you cannot erase or withdraw it. What you can do is give a further or corrected statement, but the original stays on file alongside it, which can create credibility problems. What happens next depends heavily on whether you are a suspect or a witness, and you should get legal advice before saying anything more.
It can, but indirectly, and through federal immigration law rather than the order itself. An intervention order in Victoria is a civil order, not a criminal conviction, so on its own it is not a “substantial criminal record.” But under the Commonwealth character test in section 501 of the Migration Act 1958, a visa can be refused or cancelled on the basis of general conduct, and family violence is a primary consideration in current policy. So an intervention order can form part of a character assessment, and this is a matter for specialist migration advice.
Yes, but usually indirectly. An intervention order in Victoria is a civil order, not a criminal conviction, so it does not by itself create a criminal record or appear on a standard police check. It can still affect your job through a firearms prohibition, a working with children check, professional registration, order conditions that clash with your work, and, most seriously, if you breach it, because a breach is a criminal offence.
After you are charged, the next steps usually depend on the offence, the court, whether bail applies, and whether the matter may resolve by negotiation, plea, diversion, or hearing.
