Here is a typical schematic for a PNP "high side switch", low current design. For your particular application, follow the basic design rules for saturated bipolar transistor switches. Good textbook: The Art of Electronics, by Horowitz and Hill.
See schematic in post #7.
NPN transistor can be almost any general NPN transistor.
BD679 is a power transistor. It is not made for this purpose, but I guess it would work.
Usually BD transistors have lower amplification factors, but here that does not really matter, as even a factor 10 would be sufficient in this schematic....
What are the devices you want to control???
Given the fact you are using BD transistors, it seems that your load might be far lower than the 4 kOhm shown in post#7.
If so, you would need to reduce all resistors in the schematic accordingly... It will be important to drive your power transistor into saturation, so the base resistor to your BD PNP would need to be order of magnitude 100 Ohm if you have a 10 Ohm load (I see @jremington already warned you for this)...
What about power transients? )))
without this resistor, when power is applied, the relay may spontaneously turn on for a while
PS we live in an imperfect world and components from China are no exception