Any old clicker will do the box ones are the best you will probably need a few as I always lose mine.
I put a hair tie onto the clicker and wear it around my wrist so I can hold it easily in my hand and also be able to give out treats.da
Just start by clicking and then give a treat do this for 6 or seven treats several times through the day. You will probably already have a dog that does not takes its eyes off you.
Next day say his name and when he looks at you click and treat do this several times a day.
Depending on how quickly he cottons on (probably very quickly)
You can teach a hand touch put your hand out to him palm first he will sniff it click and treat. Start moving your hands into different positions and when he touches it with his nose click and treat. When he is really good at this you can give it a name eg touch.
Get him to sit and the minute his bottom is on the floor click and treat.
Get him to look you in the eye and click and treat. You can proof this by holding a treat out in you han and when he gives you eye contact click and treat.
Re pulling on the lead - once you have a really good touch command you should be able to get him in to the correct heel position by putting you hand in the right place click and treat. Practise this loads at home without a lead add the word heel when he is comfortable with the position and then you can add this to the outside walking.
Alternatively every time he looks at you click and treat if he does this on the walk he naturally falls into the heel position as he turns his head so click and treat away.
Obviously you will have to build on it to work with distractions but it really is very easy and quick.
Any trick is so much easier to teach paw when the dog lifts his paw click and treat.
Also once the dog gets the hang of clicker training they will start to give you new behaviours. Do just get a box and have dog and clicker and see what the dog does, click the behaviour you like eg sitting on the box, putting the front legs on the box. openining the box etc.
Teach the dog to tug on toys so if not a natural tugger put the tuggy toy on the floor if the dog looks at the toy click then if the dog picks up the toy click etc until the dog is happy to tug. Then you can teach loads of tricks emptying washing machine (tug command on the clothes) open doors tie a tuggy to the handle of the door and again the tug command, take off your socks and shoes, pull you off the sofa to look after those tummy muscles all with the tug command.
have fun!
You will have a dog so on to you that he will look at you all the time waiting for the fun to start!