Your hitpoints in LOR is calculated as such for every level)
Race Hitpoints + (Class Hit die max + Constitution Modifier)
Dodge is calcualted by:
(8 + dex modifier)(To a max of your armor dex cap) + Dodge Proficiency Modifier
Armor is calcualted by:
Armor Value from armor + Armor Proficiency Modifier.
Temporary Hitpoints is hitpoints that stacks on top of your normal hitpoints. You always subtract your temporary hitpoints before hitpoints. You lost all temporary hitpoints when you take a long rest.
You can only have 1 source of temporary hitpoints unless stated otherwise.
Speed comes from your race, some feats and traits also provide extra speed