Hello and welcome to the forum.
Doing a tune up to an old machine that is new to you is never a bad idea, but it is also nice to know that you are doing something that needs to be done. That said, filing the points is usually good enough to bring them back into shape. Points in these engines usually last a long time, depending on the hours they have ran.
"Bogging down" is such a relative term. Doesn't really explain much.
*Does it pull down and die?
*Does it pull down from an idle, or WOT, or half throttle???
*Does it pick back up once you stop moving?
*Is it an engine problem, or a trans problem?
*How much was the tractor used prior to you getting it? Was it a weekly use machine? Or has it sat?
*Has the engine had any work done to it recently?
Lots of questions..... need some more information to help you legitimately. My initial response would be to clean the fuel system including removal of the tank and carb, replace the fuel lines, at the least remove the bowl off the carb and drain it. File the points and time the engine as per the engine manual. (More info on that can be provided if necessary.) Check and replace the air filter as necessary and service the hydro trans with new oil and a filter.... It that doesn't help, pull the head and check things out.