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I believe your only option is getting temp plates until it gets inspected and and emissions are done.
Last fall, I bought a car in New Haven, but was titled in Florida. DMV wanted me to get a temp plate. Instead, the previous owner let me use his plate to drive it home. I stopped for the emissions test on the way home, and mailed him his plate right back. No temp tags. I was lucky in that the previous owner trusted me with his plate.
If you have a friend who is a registered dealer, and will let you borrow their plate, you can drive it home that way too. Thats what I did when I bought my Mustang from MA.
Although, the likelihood of getting caught doing so is small, you did commit a misdemeanor motor vehicle offense (or two) by using the previous owner's marker plate. It's called Misuse of Marker Plate(s) under CT General Statutes 14-147(c). If your vehicle was uninsured and unregistered (by you - the new owner) at that time, you also committed the misdemeanor offense of No Insurance 38a-371 and the infraction offense of Operating an Unregistered Motor Vehicle 14-12(a)*. If you're going to offer advice, you just want to make sure that it is good legal advice.