I the Random magic card it said on 1 or 2 that you need to lose strenght,

Dose it mean that you need to lose all you gaind strenght tokens,

(i.e I have 2 strenght value and 3 strenght tokens, so i lose all 3 tokens or only 1?)

Random Spell states that you lose all your Strength or Craft, except those gained from Objects and Followers IIRC. And you never lose your starting value.

And of course, roll of 1 is Toaded.