transmission fluid levels

Just bought a 2002 Toyota Tacoma 4cyl 2.7L. The transmission fill tube snapped where it meets the transmission fluid pan tube and spilled all my trans fluid out and died. I have it back home now and all the parts ordered to fix. The only info I cannot find is the amount of fluid to replace.

I am also worried that since she was running low on trans fluid for awhile that she may have grinded some gears up. I don't know how long it has been since the trans filter was replaced. Should I be doing a full filter and fluid change while I replace the fill tube?