i guess im a noob

You start at level 1 each match. Unless you change the starting level in the game options.

Thank you how you do that

You do that in a game's setup lobby ... when you have a direct input on what map and how many players you want in -- a freedom of game-setup choice you do not have in certain game modes.

Look to the right of the list of demigod players you want in, below the map-image : it says « Options ». Click, and then you will see a detailed menu with a lot of game-setup options.

When I play alone, I select "infinite timeouts", there, an option which allows me to pause a game for as many times that I wish. 

sigh...

looool

its kinda the point of the game, if you start at lvl 20 everyame its kinda lame.

depends if ur testing a build it is useful but starting with 25K gold is anouying

You get to keep favor items. I guess that's something. *shrug*

yeah and favor items suck, decreases skill gap most of the time