Yes. Debian is by default 100% libre (it has been since Debian 6). The kernel is deblobbed.
Yes. You can install the jxself's kernel in Debian. In fact I am using 3.10.80 in Debian 8 stable Xfce and everything works flawlessly. I get all the updates.
I have an ati crap and recent kernels have issue with screen resolution with ati graphics. So I installed the older kernel from the jxself's repo.
Cheers!
