The Granata's 19-year wait for a victory over the visitors continues after an enthralling encounter at the Stadio Olimpico
The Nerazzurrihave not lost to the Turin side in 19 years, but that record looked in danger early on when goalkeeper Samir Handanovic was sent off for a foul on Alessio Cerci.
Cerci saw his resulting penalty saved by substitute keeper Juan Pablo Carrizo before Torino took a deserved lead soon after through Swedish midfielder Alexander Farnerud.
Inter, though, rallied and Fredy Guarin punished Torino keeper Daniele Padelli's mistake with a superb bicycle kick to equalise on the stroke of half-time.
Second-half substitute Ciro Immobile put Torino back into the lead with almost his first touch before another mistake by Padelli was punished by Rodrigo Palacio.
And the Argentina international grabbed another from close range in the 71st minute before Bellomo's inswinging free kick deceived Carrizo and flew into the net, bringing his side a last-minute reprieve.
Torino were almost ahead within two minutes when Cerci's perfectly-struck volley from the left corner of the penalty area beat Handanovic but cannoned off the base of the post.
Handanovic was given his marching orders with five minutes on the clock after he failed to beat Cerci to Farnerud's low cross and sent him crashing to the ground, giving away a penalty in the process.
Walter Mazzarri brought on Carrizo to replace attacking midfielder Mateo Kovacic and face Cerci's penalty.
The former Roma attacker stepped up confidently but Carrizo, making only his second Inter appearance, dived full length to his right to make a great save.
As Torino turned the screw Carrizo again saved well when Danilo D'Ambrosio fired in a shot from the edge of the area.
Inter, though, were unlucky not to take the lead when Guarin's cross just evaded Yuto Nagatomo at the back post.
The hosts did take lead when Cerci's clever flick was nodded into the path of Farnerud, who showed brilliant composure to beat Carrizo with a left-footed finish on the half-volley.
Inter slowly came back into the game and they got an equaliser with a sublime strike from Colombia international Guarin.
Padelli's attempt to deal with an Esteban Cambiasso corner only resulted in the ball arcing into the path of Guarin, who pulled off a magnificent bicycle kick to score into the empty net.
Farnerud returned after half-time with a limp and was soon making way for Immobile, who had an almost immediate impact with the equalising goal. As Cerci dribbled into the area, the ball broke to the former Genoa attacker who unleashed an unstoppable left-footed shot past Carrizo.
Torino, however, seemed to switch off following the goal and when they allowed Saphir Taider to cross from the left, Padelli misjudged the flight of the ball that broke for Palacio to head into the empty net.
And things got worse for the hosts when substitute Ishak Belfodil’s excellent low right-wing cross found Palacio inside the six-yard box and the former Boca Juniors striker finished well for his fifth of the season.
But it was Torino who had the last say when substitute Bellomo sent in an inswinging cross from a left-wing free-kick that deceived Carrizo and ended up in the top corner.
And the hosts almost grabbed a winner deep into injury-time but Immobile blazed over when teed up by Cerci.