Switching the motor to electric start is fairly easy as most everthing can still be bought at dealers or others. Switching to remote is an other story and can get real costly for parts and gets more involed. Not realy something for a newbe unless you have a manufactures service manual and proper tools. It could be cheaper to trade the motor for one alittle newer with the setup already. I would shop around for the cost of the parts to do what you want first then make a decission as to what would be cheaper and better in the long run.
Just my .02
Oldman570