actually im not sure if a blender is required...but having one would be fun anyway!!!
for steaming, i use a tea kettle on the stove. i have an espresso machine with a steaming wand but when i bought that, it didnt include the frothing cup which is basically the essential part of the applience lol!
if you had a blender you could make your tea seperate, and ice it so its cold. mix it with ice and the almond milk and blend! it would be an icy drink! or if you wanted one hot you could ice your tea the same way, steam the almond milk on the stove and then mix them into a cup! YUM! you could even boil the almond milk like you would boil water in a pot. just as long as its hot. the foamyness is a coffeehouse trick