First of all would Tauren be a viable race ?
Not particularly, as has already been mentioned the stun would DR your fists of fury, the little bit of health is kind of useful I guess but there are certainly a lot better races.
I'd go for undead personally if you want to go horde,
Touch of the Grave can be procced so much thanks to
Tiger Strikes, obviously from the attack speed buff but also as far as I'm aware the extra hits can proc it as well. This means it gives a rather nice dps increase.
If you'd rather not go undead then blood elf would probably be your best bet for the silence.
2nd: Are Feet of the lynx Better than Cobranhn's Boots
Yes I believe they are, but Cobrahn's are of course a suitable alternative until a feet of the lynx appears on your AH
3rd: Do i need forman's gloves or are Gloves of the fang good to
I would also definitely go foreman's gloves. You don't want the first few punches of your fists of fury being dodged as people can then just jump away from you so expertise is VERY important imo.
4th: is azure scale vest better than Looms chest
Yes if you can get hit capped without the chest. Many people go for weapon chain offhand which would let you get to hit cap no problem.
Personally I still want to experiment without the weapon chain, Tiger strikes can proc from missed swings and the extra attacks from tiger strikes use the special attack hit table so it may not be as important as people currently think. That said it will probably still be the best option due to ww white hits being such a huge part of their dps. Plus if you are undead the extra hits will proc the racial passive more and therefor even more more damage.
and lastly Do i go tigers lust or Momentum ?
Tiger's Lust. Is gives more bonus speed than momentum, plus breaks you out of roots. Plus you can use it on a friendly target if required.
You COULD go momentum when solo-queueing bgs to get around faster, but I'd still choose Tiger's Lust for it's overall better utility.