Kimmie,
Welcome to Flyertalk!
Spicejet has 20kg check-in allowance
http://www.spicejet.com/tnc.asp
GoAir has an allowance of 15kg check-in
http://www.goair.in/terms.asp
excess luggage costs are excessive.. so be careful
Your baggage cost may exceed the ticket price if you have a large bag.
I think you have enough time to transfer 10:10 AM till 2:30
No personal experience with GoAir, but you can buy tickets online for most
other airlines.
hope this helps.