Yes use the FM antenna for the FM radio , use a coax from the Fm antenna to the FM radio , do not connect the FM the Tv antenna on to the same coax. Separate coax will be used with the Tv antenna.    How Many Tv's are/will be connected?? Here are places to buy antennas and ect. , 
http://www.solidsignal.com , 
http://www.starkelectronic.com , 
http://www.3starinc.com  ,  How Many Tv's are/will be connected??