First car 2010 1.9 leon basic servicing

[Cupra2010]

Hello,

This is my first car and looking to sort a few bits on it such as a new set of filters. Is there any brand I should avoid/go for?
And with just buying this car, is there anything I should be looking out for, it has done 118k miles?

Issues seen so far are a bit of black smoke when heavily accelerating and then letting off, Boost pressure warning on the system check but nothing notable relating to the performance of the car, one of the rear doors doesn't always allow opening from the outside unless first opened from the inside and minimal oil leak from the oil cap.

Any help regarding the car would be amazing.

 

[R3k1355]

Have always found MANN filters to be decent, but there's lots of good options.

Black smoke and warnings is possibly the N75 valve, or turbo actuator.

The problem with the door opening is usually the door module, you can fix it with a drill and some WD-40