well when you reach jounin rank, you can start to use summonings in combat...
Its simple, perform the series of handseals, bite your thumb, slam your hand to the ground and use:
Summoning Technique (Kuchiyose no Jutsu)
Rank: C
Type: Defense/Attack/Suplementary
Range: Short-Long
Chakra Cost: 15
Damage points: N/A
Hand Seals: Boar, Dog, Bird, Monkey, Ram, Palm On Ground
Description:To summon the creature the ninja will wipe blood on the hand, perform the necessary handseals and then touch their hand to the ground or another object. Though it appears that as long as significant pressure is placed against the blood in some form, the summon will be complete. There can be variations to the summoning steps, some ninja like Temari will wipe blood on her fan, then by swinging the fan the animal is summoned. Other ninja like Orochimaru wipe the blood across a snake tattoo on their arm first, then touch the ground.
Then say which toad your summoning....
At your rank i dont think you can summon gamabunta... maybe when your sannin rank... and you cant summon ma and pa until you attain sage mode