There are four options:
First Capital Connect trains only and no tube/buses:
Weekly 149.50
Monthly 574.10
Yearly 5,980.00
First Capital Connect trains only to the boundary of Zone 6, and then all trains, buses and tubes in Zones 1 to 6 (i.e. an out-boundary travelcard):
W 180
M 691.20
Y 7,200.00
Any trains to London (so fast East Coast trains as well as FCC) but no tube/buses:
W 177.50
M 681.60
Y 7,100.00
Any trains to boundary of Zone 6, and all trains, buses & tubes in Zones 1 to 6 (i.e. travelcard):
W 192.60
M 739.60
Y 7,704.00
Note that if you only make two single Zone 1 tube journeys each day, it may be that a trains-only season ticket plus Oyster Pay-as-you-Go on the tubes would be cheaper than a travelcard, e.g. 149.50 + (10 x 2.20) is £171.50 which is less than 180.