What is the diffrence between the full tort and limited tort auto insurance?

i have just moved to nj from england and im trying to get insurance on my range rover i have just bought here but your insurance is totally diffrent to ours what is full tort and limited tort (etc) on progressive i can get my range rover insured for $200 a month but then it says recommended $450 and plus package $570 we dont have these diffrent packages i have no idea what bodily injury is and it goes on about all these thousends of dollars on property damage and lawsuits and uninsured its all so confusing can someone please help and break it all down im only 20 but im 21 tomorrow i moved here in april this year so i dunno if it will be cheaper when im 21 tomorrow i know it drops in england when your 21 but im not sure about here any advice would be appreciated thanks p.s love the country :)