No running your phone in Safe Mode won't allow you to remove that cruft. Safe Mode is just booting your phone up so it's running in a 'clean' Android mode, without loading up any of the apps you've installed. It doesn't allow you root privileges. Since those Pandora's Box services are running as part of your operating system, Safe Mode won't help you in this instance.
When your phone is running in Safe Mode, the various apps and things you've installed that might normally be running in the background won't be started, your phone will be running just it's clean Android OS, no third-party apps or processes. So apps like your texting app, that normally will get automatically started and run in the background, will still work, you just have to launch the app the manually. Safe Mode is when you're trying to diagnose a problem. As a hypothetical example, you might have installed two apps that both use Bluetooth and because of some random conflict those they kill off Bluetooth completely. But as far as you know, it's just a matter of Bluetooth has stopped working. By running your phone in Safe Mode those two apps aren't being loaded up so you can at least rule out a hardware failure, that narrows the problem down to being software related. Determining which one of those two apps is another matter.