Translation:Let's sit down and watch TV.
Is 'suwatte' the imperative form of 'sitting'? And are there no particles like 'and' required before following with 'TV'. And most importantly, how can i access the comments outside being randomly asked this question. The web page says that there is no web version of this course. :(
"Suwatte kudasai" is the imperative form of the verb "suwaru", meaning to sit. "Suwatte" on its own, though, is known as the -te form. The -te form of a verb is used for many things, including conjugating many forms of a verb (for instance the continuous and imperative forms) but in this case it is used to join two sentences, which is why you don't need "and". "suwatte mimasu" is just how you say "sit and watch". Unfortunately, I can't help with the last question!