Don't use two in one polys, they suck.
If you want / need to change the color to match the chairs, I'd recommend a good gel stain. Theyr'e the easiest thing to use and get a consistent look to the finish.
Now, on your finish coat. I'd probably do a poly because the surface will get plenty of wear. At least 3 coats, maybe more. I usually use minwax wipe on poly (mainly because it's the easist to use). Do a coat, let dry for a day, sand to knock it down, clean with a tack cloth, and then put on another coat. Repeat until thick enough.
And the most important step if you want a professional look:
After you are done with the last poly coat, let it sit for 30 days. It needs this time to cure. Then after that time passes, use a very fine steel wool pad on the table. Then apply a finishing wax and buff it out. That will give you a very smooth, shiny professional grade look to your table.
A book I can't recommend enough is "understanding wood finishing" by Bob Flexner. It is the bible of wood finishing. Get it and read it before you start.