Im interested in making fg, is it easy to start out Realm of the Mad God without any fg? or do you need money going into it. Also it seemse slling life/mana pots are decent money, are those easy to obtain? Let me know plz.

1. Easy is a point of view. I didnt find it hard to start off with nothing but its much easier to build up once you have already gotten established.
2. Money isnt required but you may want to buy a few vaults/hero slots to make things easier and reduce the time you spend moving things between mules.
3. Life/Mana are relatively easy to get through farming abyssals, then trading the def/vit you get for the life/mana.

u dont need money... but makes life alot easier (vaults and more charslots)
i dont think that u can make easy fg here, if u're unexperienced in playing rotmg and have to start from the scratch

i guess u've already read the beginners guide
http://forums.d2jsp.org/topic.php?t=70422919&f=174

in order to farm life pots, u need a maxed char and some friends, to be able to buy a tomb key for 3life pots and cleaning tombs safely and fast
guess that will take some time until u reach this point
mana pots are easier to farm in first place, but its not as effective as farming life pots... u have to pay for ots (bad for profit trading), or hunt herm (usually crowded) and lucky djinn

why dont u just start playing the game for fun and if u are doing well, start selling here
we dont have many people here, who are actually buying things... so dont expect too much

Vouch.
Also it doesn't take very long at all to get good enough where you could farm def pots at the very least, which sell for 10fg(?) at the moment.
Say you run abysses non-stop (assume solo for the guaranteed drop), you'll get at the very least (I say this loosely cuz if you have to nexus, afk, etc., that'll mess you up) 2-3 def pots per hour as well as some other items that you could easily trade for def. To give you a rough estimate, I'd say a relatively new player could make ~50fg/hr playing. Just gotta learn to play safe always. Never go for the kill if it means you risking your life.

Another question, is the browser version the same as the steam version? If not which is the official version/more played.

All the same, but browser version runs the least smoothly imo.
I prefer using flash projector over all the other options.
https://www.realmeye.com/wiki/using-the-adobe-flash-projector-to-play-rotmg