UO Second Age

I've started to play recently. Haven't played this game for more than 5 years and after reading templates of what kind of character to create I started to doubt my decisions:
Tactics
Swordsmanship
Anatomy
Healing
Mining
Blacksmithing
Hiding (or lockpicking)

Good/bad - why?

Also, does it matter here whether you have iron armour or any other type that you can get only if you have more than 65% mining or something?
How do you set-up Razor to sell many things and not 5 at a time?

Mining and blacksmith on a dexxer offer no type of bonus or benefit. The beauty of having 3 accounts is that you can make different chars with diff templates. I'd personally split the mule/crafter and the warrior templates, that way you have 2 chars who are good at what they do, instead of one that has some compromise.

As far as selling more than 5 items at a time, you can set up a sell agent under the "agents" tab in razor and add what you want to sell a lot of, then just go up to a vendor and say "vendor sell". You'll still only sell 5 at a time, but you don't have to increase the amount mannually.

We have different colours of ore/ingots here, but the armour made from the colours doesn't have any special properties over normal iron.

T2A doesn't have the other "resistances" - only Physical Resistance, which is armour rating (AR) in T2A.

Ok, I've started a new warrior:
Swordsmanship
Tactics
Anatomy
Healing
Archery / Cartography
Resist spells
Lockpicking

Is this better?

Carto/Lockpicking is better off on a mage, since only the map reader can dig up the treasure. If you can't recall to the tmap spot, you'll have to have someone gate you everywhere.