If the monster has racial skill bonuses, typically it will be mentioned at the bottom of the entry under 'Skill'.
There will also be a '*' next to the skill entry in the stat block.
If you choose to play something other than a 1 HD humanoid, the skill package comes free with the monster, but take note of the fact that this group of skills is considered the '1st level' skills of the monster so when you add the first class level you don't multiply by 4 to determine how many skill points you gain nor do you gain the 1st level bonus feat.
If a monster has a save bonus, it will be mentioned in the entry (usually) as an extraordinary ability. Otherwise, the monster has saves appropriate for its type and HD.
If a monster entry does not mention a prefered class, the default assumption is that it does not have one.