Congratulations
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1. No, you'll have to apply for a National Insurance number yourself
2. No, you won't get a visa sticker... your BRP card is your visa. So you show both your passport and your BRP at immigration - keep them very safe as you will need them both to leave and re-enter the UK
3. Your renewal will be in 30 months' time (2.5 years) and yes, the process and documents are currently exactly the same. The fees could be much higher by then though!
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