While T2 is definitely a direct sequel of T1, you have to realize, these are both games that focus on "kill everything that moves" and "loot everything you see". The storyline is only there to help players become familiar with areas and the enemies that arise from them, but isn't necessary play T1 over T2.
Honestly though, T2 is a completely reworked version of T1 that features a whole slew of new improvements, as well as dedicated modding support, etc.
Consider this, it's very much like the L4D series. While L4D had a storyline, and so did L4D2, the story lines were only vaguely connected, but the game was more about a zombie co-op game. This isn't to say the storyline was non-existent, but it's there to guide players to understand what's happening around them. Gameplay-wise, much like TL2, L4D2 is a very very nice upgrade to L4D, in that there are more weapons, more game modes, more special infected, and other nice sweets.
Basically, consider T2 over T1 as a nice upgrade, with more features than its predecessor. If you really really care about storyline, by all means, it doesn't hurt to play T1. If you really like gameplay, then I'd say it really doesn't matter.
I think all the character customization options are available -- at least that's how it appeared to me as I booted up the demo for the first time last night. There's also a randomization feature if you just want to click that until you get something you like.
I also like the fact that each class can be male or female and that when sending your pet to town you can also include a limited shopping list that he'll fill (potions and identify and town portal scrolls).
I believe the demo is so large because it includes the entire game but, of course, it's locked beyond the demo part until you pay for it.
Oh, one other addition/change from the first game -- you may now "fish" with dynamite. Not very sporting, but faster -- though I think the instructions for using dynamite to fish say you won't be able to catch as many fish from a given fishing hole as you can with a fishing pole.
Best Answer
How to Activate the Console Window
%userprofile%\My Documents\My Games\Runic Games\Torchlight 2\save(There's a subfolder in there which is just a bunch of numbers, and in that subfolder is your settings.txt file, along with all of your saved games)Console :0. Change the parameter fromConsole :0toConsole :1to activate the Developer Console, enabling use of cheat console commands in Torchlight 2.NOTE : Using the DEV CONSOLE risks having your account marked as suspicious to unmodified players of Torchlight 2 online. Use console commands at your own risk.
Source: GameFront