I thought 6x BB would be the right amount here, but not even close.

PokerStars, $10/20 NO Limit Texas Holdem Tournament, 8 Players
Hand Converter by Pokerhand.org

Board:
borjacho (UTG): $1*550,00
drogbinio13 (CO): $1*490,00
I'm Rooted (Button): $1*470,00
negroh2901 (SB): $1*480,00
cAApo78 (BB): $1*500,00
ikapov (UTG+1): $1*480,00
toptop875 (MP1): $1*530,00
tina97000mcc (MP2): $1*500,00

Dealt to I'm Rooted A:diamond: K:heart:

Pre-flop:
ikapov calls $20,00, toptop875 calls $20,00, tina97000mcc calls $20,00, borjacho calls $20,00, (1 folds), I'm Rooted raises to $120,00, (2 folds), ikapov calls $100,00, toptop875 calls $100,00, tina97000mcc calls $100,00, borjacho calls $100,00

Flop: ($630,00) 7:diamond: 4:club: 8:spade: (5 Players)
ikapov checks, toptop875 checks, tina97000mcc bets $20,00, borjacho calls $20,00, I'm Rooted calls $20,00, ikapov calls $20,00, toptop875 calls $20,00

Turn: ($730,00) 6:club: (5 Players)
ikapov bets $100,00, toptop875 calls $100,00, tina97000mcc calls $100,00, borjacho raises to $220,00, (1 folds), ikapov calls $120,00, toptop875 calls $120,00, tina97000mcc calls $120,00

River: ($1*610,00) T:heart: (4 Players)
ikapov checks, toptop875 checks, tina97000mcc bets $600,00, (3 folds), tina97000mcc returns $600,00

Results:
tina97000mcc wins $1*610,00

A couple of hands later on another table:


PokerStars No-Limit Hold'em, 1.5 Tournament, 10/20 Blinds (9 handed) - PokerStars Converter Tool from FlopTurnRiver.com

Hero (BB) (t1480)
UTG (t1470)
UTG+1 (t1570)
MP1 (t3900)
MP2 (t3640)
MP3 (t1400)
CO (t820)
Button (t2770)
SB (t1140)

Hero's M: 49.33

Preflop: Hero is BB with A, J
2 folds, MP1 calls t20, MP2 calls t20, 1 fold, CO calls t20, Button calls t20, SB calls t10, Hero bets t100, MP1 calls t80, MP2 calls t80, CO calls t80, 2 folds

Flop: (t440) 2, 10, 7 (4 players)
Hero checks, MP1 checks, MP2 bets t220, CO calls t220, Hero folds, 1 fold

Turn: (t880) 3 (2 players)
MP2 bets t440, 1 fold

Total pot: t880

3-4xBB+1/limper (Three to Four times the big blind, plus an additional big blind for every limper in the pot) Reply back with the amount you should have raised based on that.
That said, it still can be hard (or impossible) to knock people out in a MTT early on preflop, I doubt a larger raise would have changed things much.

Hand 2, I probably would have just checked. AJo isn't a strong hand, especially in a raised pot OOP vs. so many, and they would call because they think "lolpotoddslol" and overcall down the line. I'd hope for a top pair+ type hand and a "kinda" wet board so we can knock out some of the tards. If it's a very wet board you gotta be careful due to reverse implied odds (ahead now but likely to lose a good amount by the end of the hand.)

140-160

I like that "reverse implied odds" because that's about right.

Early in a big micro MTT % of wins to hands played is usually very low yet later in the game when blinds are big the number of hands won can exceed the number of hands played as pot stealing takes down a lot of pots.