Maximum allowed to enter the Machu Picchu is 20 kilos. There is a storage service before entering the site where you can leave your bags for an extra cost. We recommend you don't take much on the tour anyway, and leave the stuff you don't need at the...
Yes sure it's possible to buy a Machu Picchu tour if you already have purchased the entrance ticket yourself.Of course ourselves or the operators cant be responsible for any issues that might occur if there is a problem with you ticket during the tou...
This is of course relative - depending on your condition, how the altitude affects you and if you are acclimatised well, how used to these kinds of activities your are. That said the Inca Trail Classic is considered to be a mid-level / moderate trek....