I wouldn't even attempt tuning it yourself, that's a high precision and very time consuming job. It requires a trained ear, and to be honest even with a tuning fork the chances of you getting a decent result are slim i'd say.
You might be able to fix stuck keys if there aren't too many and they aren't too bad just by freeing up the mechanism in a couple of places.
Pianos are mechanical after all so there's no black magic to it, but for anything more than the very basics (freeing up, lubricating the odd stuck lever where you can get at the problem without stripping it down) then get a pro in.
Difficult to say for sure without knowing more about it, but if you get lucky you might find a tuner who will come in and just do the basic stuff to get it working, and quickly correct the worst tuning flaws. I say "get lucky" because the times i've dealt with piano tuners, they are craftsmen. Very meticulous and precise. They will tune an instrument until it's as close to perfect as it can be, or not at all.
If you've bought it as a serious instrument and an investment then you might want to go down that road, but if it was something relatively inexpensive and mainly just for fun and fooling around on, then if you can get a "quick and dirty" tuning job done so it sounds OK, & then have a look at the stuck keys yourself then you'll probably save a bundle. A pro will more than likely want to spend time on it getting it perfect (or as close as poss).
Worth saying also that it's a good idea to wait a while before getting it tuned, as it will need to settle into it's new home for a while first. Different moisture levels compared with its old home, and just the act of moving it will all have an effect on it staying in tune. If you get it tuned today 2 weeks from now it will more than likely be off again.