Can you have inplants done about a year after tooth extraction? And can you have bone grafts done after a year or so to?

u can go for implant any time after extraction. but ideal recommendation is immediate [if possible] or after 3 months . otherwise with time bone starts resorption and additional bone augmentation surgery may require . 

Yes. You can have bone grafting procedure done a year after extraction or a tooth and then you would wait about 3 months before placing the implant.

It is usually recommended to place the implant same time of tooth extraction if possible or shortly after to avoid bone loss. 1 year after extraction is fairly not so long depends on the way of the tooth pulled , atraumaticaly or not and site of extraction. Most of times it is pretty simple to graft after one year as it is still the bone loss is not as big compared to waiting for few years.