The thing that corcerns me a bit are the feats: I know that power attack, raging vitality and arcane strike are all good ones, but also is Raging Blood, iron will and bloodline familiar.
You don't even qualify for Raging Blood, and I don't know why you would want it. Bloodline Familiars don't require a feat, is there some other such option that I'm missing?
Power Attack, Raging Vitality, Arcane Strike, and Iron Will are all good, but you don't need any of them super early on*, and you get a bonus feat at 6th level. I don't think there is necessarily a "best" order, nor are games usually that difficult that you'd to follow it, anyway.
*) Power Attack only gets good at 4th level, Arcane Strike at 5th level. Raging Vitality's main effect is save you from forgetting that the bonus HP from Rage do not stave off death, if you calculate damage taken against your non-raging HP in regards to when to retreat/drink a potion/etc., you're generally fine.
should i pick a monkey to feed me some potions or the hedgedog for +2 to wis?
Depends on GM, campaign and party. The degree of danger a familiar that makes themself a target on the battlefield is in varies greatly, and unless you keep the monkey right next to you, feeding you a healing potion after you drop takes two rounds at best, and the action provokes an AOO (more against an enemy with reach) - in a higher powered game this might not even be too useful to have.
Im also a bit concerned about rages per day, should i invest my favored class options for extra rages per day or just go with extra hp?
This, too, depends on the campaign. Usually, you have enough daily rounds after a couple of levels, and thus every investment you make is wasted later on (although even that can change if you take Raging Brutality
Derklord's link has the information, but it sounds like you may have been confused when reading it. It already works where you trade out your 1st-level bloodline power for the bloodline familiar and its listed boost. I doubt you will miss the 1st level bloodline ability from Arcane anyway.
To avoid confusion, Power Attack is good at level 1. As early as level 3, you will likely be facing some DR, which PA helps surpass. But yeah, it's not like you have to take PA at level 1, if there are things you want even more.
I don't even think the Bloodrager could take Arcane Strike before level 5, without retraining.
It's impossible to tell you which familiar suits you best. The one that gives +4 to initiative is also really popular. You just have to choose on your own, which features you will want the most. I will add that while the Bloodrager doesn't have great will saves, it does pretty decent with its bonus from bloodraging.