The tires mentioned can be considered performance tires and thus will not offer the mileage that you want out of them.
Short answer is yes, you can mount touring tires provided they're the same size as stock (to maintain the correct speedometer readings) and yes you can install regular tires i.e. non-runflats. I would urge though to at least mount good quality tires from a reputable brand purely for safety's sake.
The brake pads as mentioned can be replaced by other brands at an independent mechanic or by yourself if you're up for it.