[Just Started, Got A Couple Of Questions]

First off, I noticed the platinum currency and I was curious to know if it is only buy-able with real money? Probably, but I'm just making sure.

Second, and kind of related to first: some stuff have prices in either "credits" (?) or platinum and I want to know if things like warframes slots or weapons slots are really limited by real money.

Third, I've used some of my starting platinum on an item that supposedly refill my ammo, how do I use it?

Fourth, how hard is it to get new warframes without platinum?

I'm not necessarly against coughing up some cash on the game, but I just wanted to be more informed.

[Minor Clipping Bug]

I was playing and saw this happen:

http://cloud.steampo...3A503DA228FC2C/

As you can see in the picture, the Grineer Lancer is stuck in some sort of barrels.

Unfortunately I don't remember which level it was, but it was in one of the first ones because I only just started.

Upon being shot enough, the Lancer staggered out of the barrels like they weren't there.