P.,
My experience is that they get 'energized' at bedtime because they are tired - usually followed by a very crabby period when it becomes extremely difficult to get them in bed.
I would try putting him to bed a little earlier, make a set routine that is pleasant for both of you - bath, storytime, prayer, lullabye - whatever fits, consistent routine is key to 3 yr olds and it will calm him. The other Mom who asked about his nap schedule makes a good point as well - inquire about how long he is sleeping during the day when you're working, that might have to be shortened.
After the 'tucking them in' if my kids get out of bed they were always dealt with very, very seriously by me - this is one thing that has always been important to me because by that time of day I am tired and need my time in order to be a good mom.
I found that they learn very quickly that if they get back up they will not be greeted by the sweet mama that just tucked them in - but rather a very firm voice and no nonsense, and I mean your most serious tone - order him back to bed. Repeatedly walking him back to his room will wear you both out at that time of day, in my opinion it's not like a time-out (when you should do that for three minutes).
My daughter (5) just recently started protesting more than usual at bedtime so we have started a sticker chart - if she 'goes to bed without arguing' for five days (or close to it) she gets a reward. You could try that with your little guy, if he resists after you order him back to bed - tell him 'okay, no sticker for tonight'. We put our bedtime sticker on our chart each morning from the night before. You have to really do it right though - the first time he doesn't earn his sticker, express how sorry you are and that maybe he will do better tonight.
As for potty training - I would leave it be awhile, if he is not interested, he is not ready and you can't control that. You can just keep putting him on the potty and reading to him and he might go out of coincidence but honestly it's a big time investment and in my opinion you are better off to wait until his little bladder has matured a bit more so he has control and knows when he has to 'go'.
If you lighten up a bit on the potty training he might also be easier to get to bed for the time being. Hope that is helpful, sorry to sound like a know-it-all; just been there. Hold him close and love him - they grow up too fast.
hugs,
W.