2006' BMW 5 Series

Hello.
The car has already gone through its wear and tear and requires several treatments to bring it back to life.
It starts hard. After starting it, it will burn black. It doesn't keep the revs low.
When we drive, it has power and doesn't smoke. The turbine is working.
The air conditioning does not work (there is no belt on the compressor).
Something is knocking on the front right side.
The car has a valid inspection until May and third party liability insurance until mid-October.
New winter tires.