1 - they changed T3s a bit back, those are refunded SP.
2- If you are an alpha clone (free to play) you can only use ships from the race you were born from and even then can only use some skills. Higher-level skills you may have trained previously are locked until you subscribe again.
The only time your sec status really matters is if you want to operate in highsec.
A little for lowsec too, but for both nullsec and wormhole space, your sec status is pretty much irrelevant to the pvp. People will attack you whether you are +10 or -10. Makes no difference.
If you are day tripping out of wormholes and are in lowsec, then the -10 status can be great at encouraging people to attack you on gates, but otherwise, if you want to control the start of engagements, just don’t hang around on gates too long. Again, in nullsec it is irrelevant either way.