New 2002 X5 owner - Some Questions

[DTC9968]

I just purchased a 2002 X5 4.4i
I bought it for a good deal but I knew it had some issues that I can fix but a few I want to get your opinion on.

1. Need brakes and pads - Ok with that as I am mechanically inclined
2. Rear trunk button does not work - Have power to the switch?
3. Drivers door handle - understand you replace the mechanism - Yes or No?
4. Whirring noise up front - Wheel bearings?
5. Codes come up - Secondary air Injection system bank 1
- Secondary air Injection system bank 2
- What needs to be done here or replaced?
6. Left front inner tie rod end. Ok with that.

Thanks for the help in advance.