Graviton has 3 lightning bolts and TK, can I target 3 characters for TK? What about 3 objects? All as one ranged combat attack is what I mean. Please help!!!

Telekinesis specifically states a single target. You cannot spin three objects / characters about.

If the power or ability states a 'ranged combat attack' then you would use the number of shots you have. For instance, Incapacitate, which Graviton also has, can drop a token on each of three opposing characters if the attack is successful against all of them.

I see what you mean when it comes to attacking with an object but moving opposing characters just states that you make a ranged combat attack. Gravitron has 3 bolts. 3 attacks right?

No. I bolded the line below, it states 'Single target.' For further proof, notice BB048 The Flash and Green Lantern states they can use Telekinesis twice, even though they have two targets for ranged attacks. This is because standard Telekinesis can not be used more than once per power action, and cannot target more than one charter's or object during that power action.

[quote]TELEKINESIS Give this character a power action and choose one of the following options. For all options, this character must have a clear line of fire to the target and the destination square (to which the target does not affect the line of fire). This character, the target and the destination square must each be 8 or fewer squares away from one another. For options 1 and 2, a target character would need to break away and ignores the effects of elevated and hindering terrain on movement (but does not ignore the effects of opposing characters on movement). (1) Move an Opposing Character: This character makes one close combat or ranged combat attack against a single target that deals no damage. If the attack succeeds and the target has or possesses the damage symbol (but is not a multi-base figure), the target can be moved to the destination square. (2) Move an Object or a Friendly Character: This character targets an object or a friendly character (that is not a multi-base figure) and moves it to the destination square. Characters that have been moved with this power cannot use this power until the beginning of your next turn. (3) Attack with an Object: This character targets an object and must also have a clear line of fire to a single opposing character occupying the destination square as if this character occupied the target square. This character makes an attack roll against the opposing character. The target of a successful attack using a light object is dealt 2 damage; a heavy object, 3 damage.[quote]