Joan: Saya dari Australia. Keluarga saya tinggal di Melbourne. [I come from Australia. My family lives in Melbourne.]
Budi: Berapa saudara Anda? [How many siblings do you have?]
Joan: Saya punya seorang kakak, laki-laki. [I have one older sibling, male]
Adik saya dua. Semuanya perempuan. [I have 2 younger siblings. All (are) female.]
Budi: Ibu bapak masih ada? [Are your parents still alive?]
Joan: Masih (ada). [Still (alive)]
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You can say, "Anda berapa bersaudara?" to literally ask "How many siblings are you?". So, if Joan is asked "Anda berapa bersaudara?" Joan would answer "Saya empat bersaudara" (literally "I'm four siblings").
"Masih aktif saja" (still active) makes it looks like Joan's parents are robots. xD However it can be used depending on the context.