(Moving this to Technology)
"Google play can you pay for apps on my laptop and still have them sent to my new android mobile."
I believe so. Do it on Wifi while you have the phone next to you and it should show as installing/downloading.
"Also have set my local weather on screen when does this app deduce my web allowance. Sorry I'm new to smartphones folks"
Which app are you using? It may use your data connection while away from wifi - there may be settings to deal with this however.