Second hand 90cc Chinese motorbike is hardly sign of wealth compared to a big car.
People always talk but can be ignored, if you want to avoid trouble and wasting your energy on gossip.
Lala is term of respect for an older brother. Common in the south. I know of Russian djadja for uncle. It's similar to Hindi Chacha which also is uncle. In pashto uncle is kaka or mama.
As for visiting pashtun areas as a single woman unaccompanied is not a good idea because it's not customary. You should be accompanied by security or a guardian.
BTW khatarnak means dangerous.