using galaxy tab as a bluetooth device for mobile

i've been trying to find a way to allow all my notifications and phone calls from my phone ( galaxy s3 or galaxy s5) to go through a galaxy tablet, as i'm wanting to replace my car stereo ( honda civic 2007) with the tablet and i'm wanting to be able to control my phone from the tablet and stream music from the phone. the closest thing i can think of that does this is the galaxy gear watch so can we put the capabilities of the gear in the tab. below is a list of things i wish to have. - Hands free - music sync or transfer - control music - allow the use of my data from my phone ( i know i can tether but i just thought i would mention it - make calls - view contacts from phone - use maps I really do think this is possible, so if anyone has any thoughts if this is possible then please help me out.