If it's a SHAKER it will say above the radio. Also, if the car is a 'Premium' it should have the shaker.
If you have the base radio, all 4 speakers are full range. You may want to replace the speakers and possibly an inexpensive 4 channel amp. if you go that route, you may want to get an amp that has xovers and pre-outputs as that will make it easier to a a sub at a later date.
The 'Powered by Miscrsoft' is just the sync part.
It's definitely just the base radio. What do you mean speakers are "full range?"
I am going to just upgrade to high quality speakers, I hope that makes a nice difference and if so I don't think I'll spend any more money after that.