I am just starting to learn this game. And to be honest, I find it pretty complicated.
Onto the hand, villain seems regish, comments on all streets are appreciated, especially 5th, do you find a fold there?
His check on 6th really looks like a trap,but can I really fold 7th?

Full Tilt Poker $2/$4 Limit Razz $0.40 Ante - 7 players - View hand 959979
The Official DeucesCracked.com Hand History Converter

3rd Street: (1.4 SB)
Seat 1: xx xx T ____Seat 1 folds
Seat 2: xx xx 8 ____Seat 2 folds
Seat 3: xx xx 6 ____Seat 3 folds
Seat 4: xx xx 4 ____Seat 4 completes____Seat 4 calls
Hero: 3 4 2 ___Hero raises
Seat 6: xx xx Q ____Seat 6 brings in for $0.50____Seat 6 folds
Seat 8: xx xx 9 ____Seat 8 folds

4th Street: (5.65 SB) (2 players)
Seat 4: xx xx 4 A ____Seat 4 bets
Hero: 3 4 2 3 ___Hero checks___Hero calls

5th Street: (3.825 BB) (2 players)
Seat 4: xx xx 4 A 5 ____Seat 4 bets
Hero: 3 4 2 3 6 ___Hero calls

6th Street: (5.825 BB) (2 players)
Seat 4: xx xx 4 A 5 T ____Seat 4 checks
Hero: 3 4 2 3 6 7 ___Hero checks

7th Street: (5.825 BB) (2 players)
Seat 4: xx xx 4 A 5 T xx____Seat 4 bets
Hero: 3 4 2 3 6 7 8 ___Hero checks___Hero calls

um dont check 4th. You took the lead on 3rd no reason to wave the white flag and c/c 4th. bet 6th too

I don't really think the 6th street check is a trap. I'm not saying it's never a trap but most of the time that check is genuine, meaning he can't beat a 76. Especially if he's a decent/good reg (perhaps an oxymoron at these limits) and he thinks you're just some random donk, he might be checking an 85 or something like that because he sees you have 2367 and most random donks aren't folding made 7s unless their opponent's board gets super scary (i.e. 524A, etc.)

7th street looks like he has at least a 75 made or he's launching a hopeless bluff (probably not the latter if he followed the line of thinking above) but it's suspicious enough to me so I'd still call it.

Camz, do you think if hero bet 6th that he should bet/call the river or check/call the river? I'm in favor of the latter.

I would also bet sixth. Because a good part of razz is betting your board, and because you raised third, I would also bet 4th. I'm more in favor of the C/C on seventh because it's pretty obvious your most likely betting hand is a 76 or better, so worse hands won't call and certainly better hands won't fold.

I would def bet 4th, since you raised 3rd the check makes it obvious that the 3 paired you, if you bet 4th that makes the 6 look really scary if villian is paying attention at all. I would certainly bet 6th as well and you might get a fold out of him. I don't know, thats how I would have played it but, I could be wrong.

Betting 6th is certainly a reasonable option. But if you get a fold out of him, that's not really anything to be excited about -- most likely means that he's drawing dead. Basically, if I'm Hero and bet 6th and he folds, I curse at myself under my breath...