MOT Feedback Brake Pipe and Ball Joint

[nooboy]

I have the following advisory items on my MOT certificate

1 (both front and rear) Brake pipe slightly corroded

2 Offside front track rod end ball joint has slight play

3 Nearside front Anti-roll bar linkage ball joint dust cover damaged, but preventing ingress of dirt

4 Small oil leak

I'd appreciate your views on the urgency these items should be addressed with and if possible how much it would cost.

Thanks