Villain has 78%vp$ip over 30ish hands
I figure I need to call 1.36 to win 2.09 so I need 40% equity.
imo his range is
{JJ-99,77-66,ATs,QJs,J7s,T8s+,98s,76s,ATo,QJo,T9o,76o}
and pokerstove gives me 56% against that, so that would warrant a call, correct? If you can't tell I lost the hand.

At 2NL should I pretty much always play for stacks when I hit the set? Unless I'm really deep or something?

PokerStars No-Limit Hold'em, $0.02 BB (9 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

CO ($2.97)
Button ($4.11)
SB ($3.15)
BB ($3.87)
UTG ($1.26)
Hero (UTG+1) ($1.84)
MP1 ($2)
MP2 ($2.34)
MP3 ($2.13)

Preflop: Hero is UTG+1 with 8, 8
1 fold, Hero bets $0.08, 2 folds, MP3 calls $0.08, 1 fold, Button calls $0.08, 1 fold, BB calls $0.06

Flop: ($0.33) 8, 9, 10 (4 players)
BB bets $0.08, Hero raises to $0.40, 2 folds, BB raises to $3.79 (All-In), Hero calls $1.36 (All-In)

Turn: ($3.85) 9 (2 players, 2 all-in)

River: ($3.85) Q (2 players, 2 all-in)

Total pot: $3.85 | Rake: $0.15