You aren't so much taking levels in different Totem Barbarians but just replacing different abilities of the standard Barbarian class; basically, you're simultaneously taking multiple Totems.
Basically, add together the Base Attack Bonus of all your classes and then see how many attacks you get (1 attack with BAB 1-5, 2 attacks with BAB 6-10, 3 with BAB 11-15, 4 with BAB 16-20).
Also, you can always drop your weapon as a free action and draw another weapon as a move action (assuming you carry around a close range weapon such as a Greatsword or a Greataxe). This does not provoke an attack of opportunity and allows you to fight even if cornered (yeah, carry a sword around just in case). Also, if you took those early levels in Monk, you'll be trained in Unarmed Combat so you could just hit with your fists instead (mind, a Greatsword of course does more damage).
There's notably "Iron Heart Surge" in the Iron Heart school which basically amounts to "BY CROM!" It's a very "Barbarian" ability for shaking off stupid crap affecting you.
And if Orc interests you, become a Water Orc. They get +2 Constitution over normal Orcs ('cause normal Orcs have more minuses than plusses for stats). It's definitely a fine option; big strength bonus, some constitution, lose on the mental stats; pretty perfect for a Barb.