So, I am a fairly new user to Salesforce. I haven't had any real proper training yet due to cost. I was wondering if someone could help me.

I want to know if there is a validation rule that is simple to set up for a checkbox. For example -

If in an opportunity you select a stage that is over 50% probability then the "Proposal Out" checkbox will autofill with a check mark.

Anyone? :) thank you

Jillian

Is there a way to have fields or groups of fields be visible/invisible based on the choice of a picklist field.

For example if VehicleType is 'Car' then fields pertaining to Car such as NumberOfDoors, Transmission etc are visible

and if VehicleType is 'Bike" then fields pertaining to Bike are visible such as  HandleBarType,  BikeSeatType 

I would like to put all the fields of all the VehicleTypes in one object and have the appropriate fields be visible or not depending on what the user selects from the picklist.  

Is this possible?