Alright... SnG play of pocket tens, I have had some good and not so good experiences with pocket tens and jacks.
From early position you should be betting with accordance to the blinds, if its early in the SnG you should be betting a good amount, 5-6 times the big blind (Everyone has a huge M at this point, so your bet has to be large as well to stop too many players from coming in.), as the SnG progresses and blinds get bigger and avg. M gets smaller, your bet sizing can decrease.
If one player calls your bet: If they're just calling a huge bet and not raising you I would put them on two face cards, QJ+, or any PP set mining. if the flop comes a face card, cbet about 2/3s, if they call/raise here you can be pretty certain they've hit, actually had a higher pocket pair than you/have a set. Fold unless you have a good read on them as a calling station.
If two or more players call: Again, everyone has a huge M, two people may come in playing for example AQo and KJs, if ANY facecard comes on the flop you can be almost certain you're beat, I would just be playing here looking for a set on the flop, if someone makes a weak bet into the pot I might call looking to hit a set on the turn to win the pot (ex: call 60 to win 600), otherwise I would fold.
If you have more specific situations I might be able to help more, pocket tens can be a really tricky hand. It would also help alot to know what kind of statkes you're playing at in the SnG, .30 cent SnGs have players that will shove all in to a big bet relative to the blinds from EP pocket tens, when they're only holding two facecards. That doesnt necessarily mean you should call, but its different than at higher levels of SnGs where you're probably gonna be facing shoves when people only play back at you like that with something like JJ+.