i know a fast way to level up and gain money..... fastest i can think of off of the top of my head. I just did this last night so i know it works. i got $10,000 in about 3 hours (on free account) and leveled up 3 times (from level 12 to level 15).

first you go to the phone and accept every single job you possably can, then equip an assult rifle, smg and sniper or pretty much equip what you want to equip. just equip weapons that will help you achieve the phone jobs. Then travel to ocean side and do the safe guard mission on the far side of the town (you protect a forklift) and also put the difficulty to hard that way you gain more xp and more money if you get about 70 kills at the end of each mission you will get $500 to $700 each mission. After each mission check your jobs to see if you completed any jobs if so you should go to the payphone and complete them and you will get more xp and money. Then re-take the job(s) again and then do the safeguard mission again and just repeat the process and you will not only gain alot of xp and levels but you will get a ton of cash.

 it's also important to note its really efficent if you accept all jobs you can with the weapon you plan on using, and then grab misc non-weapon related pve jobs as the rest. Remember to always keep 25 job active, and to grab all the actual missions you can, and the extra money will flow without you really even trying.

Also, if you run the first episode of bleedout, you will be rewarded with an XP boost which you can use to get even more XP!