I have little fg and this is my first LS char. What is the best barb build for that?

i am doing a barb too and i will try pure vita build

If you dont have much FG try getting as much str possible for highest dmg possible, get a Str armour and a Lifesteal charm if your going to solo or a Str charm for cata. And highest ee weapon you can use, axes work good with str but if you dont want to buy a new weapon set up when you pass to samurai use swords ( swords dont work that well with str though.)
if youre HC put first 10stats into vit.

well i am doin a barb and i started with 5fg and now hes lvl 61 and is doing the arena no probs

u want ee on a weapon this will probly be the most expensiv item imo, for lower lvls str on a weapon can be just as good

u want to aim for over 150str and over 75 dex for your total including eq, i use 25dex armor 24str charm and 59ee axe it work just fine, dex is important u may not want to stat dex but u should hav a good bit on u eq

that said i got lucky and found an axe worth 65fg and sold it when i lvled to get utlimanium axe 59ee

but still u can find solid enough gear for 15fg a peice if u look around, there was a lvl 50 axe with 26ee for 6fg the other day for example on mp

not sure how much magic find u need to get decent drops most ov the time but it helped me get a few items worth small fg

if u do get a good axe life steal becomes more effective than other like life on attack

good luck with u new barb