1: let me just say you do not HAVE to clip them, dog hair/fur is an insulator which mens warm in winter cool in summer...
however, the tzu coat needs alot of upkeep if you want to keep it long...
2: can you groom yourself, aboslutly
3: can you use people clippers...officially yes as long as there high quaility clippers...but id personally suggest a good set of pet clippers, or at very minimum invest in good ceramic blades specficically for use on the dogs if your going to be grooming them...as a hairdresser you knwo the importance of GOOD clippers...
what most people use for people hair clippers are from
walmart ect and are "cheap" sets so in those cases id say absolutly not...
but a hair dresser has acess to REAL clippers and knows how important good sharp blades are too so id say yes it can be done
and feel free to get creative too
for tzus id suggest a good set of clippers, some realy good thinning shears and a seriously good pair of scissors...depending on how youd like to groom them, hand scissoring is hard but absolutly worth it