1)

Villain is unknown i've never seen him before. I searched him and he's playing 5 tables of 2/4 and 1 of 3/6. Turn is for value cause he doesn't check back any hands that beat me on that turn imo.

River's a fold? His timing wasn't insta but pretty quick on the river.

No-Limit Hold'em, $4.00 BB (6 handed) - Hold'em Manager Converter Tool from FlopTurnRiver.com

saw flop

UTG ($573.40)
MP ($317)
CO ($80)
Hero (Button) ($400)
SB ($277)
BB ($601.90)

Preflop: Hero is Button with 8, A
3 folds, Hero raises $12, SB calls $10, BB calls $8

Flop: ($36) 10, A, 6 (3 players)
SB checks, BB checks, Hero bets $24, 1 fold, BB raises $76, Hero calls $52

Turn: ($188) 7 (2 players)
BB checks, Hero bets $125, BB calls $125

River: ($438) 7 (2 players)
BB bets $188, Hero?

2)

Villain is 25/19/3.5 over a couple hundred hands. I don't have any reads on him. His betsizing is pretty bad since he can't shove river which makes me unsure of his bluff % since thats all I beat.

Fold with no history?

No-Limit Hold'em, $4.00 BB (6 handed) - Hold'em Manager Converter Tool from FlopTurnRiver.com

saw flop

Button ($449.20)
SB ($786.90)
BB ($459)
UTG ($160)
MP ($143.80)
Hero (CO) ($416.90)

Preflop: Hero is CO with K, K
2 folds, Hero raises $12, 2 folds, BB calls $8

Flop: ($26) 7, 2, 6 (2 players)
BB checks, Hero bets $16, BB raises $48, Hero calls $32

Turn: ($122) Q (2 players)
BB bets $76, Hero calls $76

River: ($274) 4 (2 players)
BB bets $144, Hero?