How much should I have bet

[TheJunkyardGod]

I was new to this table, and i'm still fairly new to real money NL, (I know this is PL, that was one of my many mistakes)I didnt have any reads on my opponent.

Now i'm sure I made a few mistakes on this hand(mainly the check on the flop..wtf), but one thing I was curious about was the river. What should I have bet here?

Party Poker Pot-Limit Hold'em, $ BB (10 handed) converter

UTG+2 ($45.74)
MP1 ($6)
MP2 ($27.79)
MP3 ($13.48)
CO ($29)
Hero ($24.4)
SB ($23.64)
BB ($4.41)
UTG ($9.8)
UTG+1 ($27.66)

Preflop: Hero is Button with J[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/diamond.gif[/img]. MP1 posts a blind of $0.25. SB posts a blind of $0.1.
<font color="#666666">2 folds</font>, UTG+2 calls $0.25, MP1 (poster) checks, <font color="#666666">3 folds</font>, <font color="#CC3333">Hero raises to $0.75</font>, <font color="#666666">2 folds</font>, UTG+2 calls $0.50, MP1 folds.

Flop: ($2.10) 7[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
UTG+2 checks, Hero checks.

Turn: ($2.10) T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
UTG+2 checks, <font color="#CC3333">Hero bets $1</font>, <font color="#CC3333">UTG+2 raises to $4</font>, Hero calls $3.

River: ($10.10) 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG+2 bets $5</font>, Hero calls $19.65 (All-In), UTG+2 folds.

Final Pot: $34.75