*** MOD: Moved to Low Stakes [2014-01-20 5:20 CET] ***

Full Tilt, $0.50/$1 No Limit Hold'em Cash, Rush, 6 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.

BB: $119.85 (119.9 bb)
UTG: $102.50 (102.5 bb)
MP: $194.40 (194.4 bb)
CO: $39.35 (39.4 bb)
Hero (BTN): $113.95 (114 bb)
SB: $111.40 (111.4 bb)

Preflop: Hero is BTN with Jc Jh
3 folds, Hero raises to $2, SB raises to $8, BB folds, Hero calls $6

Flop: ($17) 4h Kd 6d (2 players)
SB bets $10, Hero calls $10

Turn: ($37) 5h (2 players)
SB bets $22, Hero calls $22

River: ($81) 2s (2 players)
SB bets $71.40 and is all-in

Hero?

1) When should we flat the 3bet?

2) When should we 4bet call it off?

3) Is the turn always a call?

4) What is the correct thought process on the river?