New person

Hey I'm new, well not exactly new, I'm a lvl 8. I'm just wondering how exactly I can level up faster, I've read the forum on how to do that, but I just dont quite understand it exactly.

In game in single and I hear if you are married you get better stats of some sort? I'm not sure. Anything would help to be honest, items, motivational words, advice, money, anything to be honest. 

I always recommend anyone starting new go read this out, easy to understand, and covers a whole lot of info. ;) As for marrying, it only nets you some merits over time, but you have to stay married the whole time to get them merits. ;)

Best to find a irl friend to marry in game. That way if they clean your vault and run you can beat the shit out of them irl.

You don't have to give your spouse vault access though - I'm pretty sure most people in Torn don't give their spouse vault access. 

maybe not straight away. But after you begin to develop feelings of love for your fellow pixelated spouse, you may end up trusting them with your money.

To level up fast its best to beat high level players. there is a guide, Baldrs guide i believe, that has some pointers. Its best to get to lvl15 quick and then focus on trains. If you attack high level (23+) players you should level to lvl15 within 10 days. 

Not convinced that that many people end up developing those feelings for their game spouse, but if you do get to that point, stolen money will hurt less than the broken heart.

As stated above, Baldr has created an awesome guide which helped me out a lot. Amongst other very useful information, there is a "levelling list". Basically it's a list of higher level inactive players with low stats. Their stats are shown... So when you have enough battle stats to beat them. You just need to attack them, win, and choose to leave them. This will give you large gains in exp quickly. Here's a link to Baldr's guide. https://www.torn.com/forums.php#/p=threads&f=61&t=16034448&b=0&a=0&to=18301173

You level up faster when you attack and leave on the street instead of mugging and hospitalizing.

Spend your nerve on crimes that don't put you in jail; attack often. Attack inactive low level players if you must and leave them. 

Marrying someone does not increase your stats but every 50 days you get a merit which you can use to increase your stats. 
Like everyone else said, read the guide and read torn.com/wiki 

Basically just follow bladr and Kayla guides in tutorial should get you there in just a day or 2. :)